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20781732396 = 2235483315851
BaseRepresentation
bin10011010110101100…
…000001001000101100
31222122022111101111110
4103112230001020230
5320030110414041
613314052352020
71333663545045
oct232654011054
958568441443
1020781732396
1188a4823157
12403b915610
131c62632a99
1410120578cc
158196d5516
hex4d6b0122c

20781732396 has 24 divisors (see below), whose sum is σ = 48499706304. Its totient is φ = 6925958800.

The previous prime is 20781732371. The next prime is 20781732397. The reversal of 20781732396 is 69323718702.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20781732397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92130 + ... + 223721.

It is an arithmetic number, because the mean of its divisors is an integer number (2020821096).

Almost surely, 220781732396 is an apocalyptic number.

It is an amenable number.

20781732396 is an abundant number, since it is smaller than the sum of its proper divisors (27717973908).

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

20781732396 is a wasteful number, since it uses less digits than its factorization.

20781732396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321341 (or 321339 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 48.

The spelling of 20781732396 in words is "twenty billion, seven hundred eighty-one million, seven hundred thirty-two thousand, three hundred ninety-six".

Divisors: 1 2 3 4 6 12 5483 10966 16449 21932 32898 65796 315851 631702 947553 1263404 1895106 3790212 1731811033 3463622066 5195433099 6927244132 10390866198 20781732396