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21322204440 = 23351710452061
BaseRepresentation
bin10011110110111001…
…110000010100011000
32001000222111012202120
4103312321300110120
5322131441020230
613443440501240
71353245514225
oct236671602430
961028435676
1021322204440
119051912869
12417091a820
13201a5b8524
141063b4694c
1584bd95310
hex4f6e70518

21322204440 has 64 divisors (see below), whose sum is σ = 67729361760. Its totient is φ = 5351454720.

The previous prime is 21322204439. The next prime is 21322204481. The reversal of 21322204440 is 4440222312.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 21322204440.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5223991 + ... + 5228070.

Almost surely, 221322204440 is an apocalyptic number.

21322204440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21322204440 is an abundant number, since it is smaller than the sum of its proper divisors (46407157320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21322204440 is a wasteful number, since it uses less digits than its factorization.

21322204440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10452092 (or 10452088 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 21322204440 its reverse (4440222312), we get a palindrome (25762426752).

The spelling of 21322204440 in words is "twenty-one billion, three hundred twenty-two million, two hundred four thousand, four hundred forty".

Divisors: 1 2 3 4 5 6 8 10 12 15 17 20 24 30 34 40 51 60 68 85 102 120 136 170 204 255 340 408 510 680 1020 2040 10452061 20904122 31356183 41808244 52260305 62712366 83616488 104520610 125424732 156780915 177685037 209041220 250849464 313561830 355370074 418082440 533055111 627123660 710740148 888425185 1066110222 1254247320 1421480296 1776850370 2132220444 2665275555 3553700740 4264440888 5330551110 7107401480 10661102220 21322204440