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21440343310 = 2519778713829
BaseRepresentation
bin10011111101111100…
…011010110100001110
32001100012210021211021
4103331330122310032
5322402211441220
613503300544354
71356211624351
oct237574326416
961305707737
1021440343310
1191025732a1
1241a43b20ba
132038c10299
1410756da298
1585742e4aa
hex4fdf1ad0e

21440343310 has 32 divisors (see below), whose sum is σ = 38840614560. Its totient is φ = 8521145472.

The previous prime is 21440343283. The next prime is 21440343347. The reversal of 21440343310 is 1334304412.

It is a super-2 number, since 2×214403433102 (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1543476 + ... + 1557304.

It is an arithmetic number, because the mean of its divisors is an integer number (1213769205).

Almost surely, 221440343310 is an apocalyptic number.

21440343310 is a deficient number, since it is larger than the sum of its proper divisors (17400271250).

21440343310 is a wasteful number, since it uses less digits than its factorization.

21440343310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14820.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 21440343310 its reverse (1334304412), we get a palindrome (22774647722).

The spelling of 21440343310 in words is "twenty-one billion, four hundred forty million, three hundred forty-three thousand, three hundred ten".

Divisors: 1 2 5 10 197 394 787 985 1574 1970 3935 7870 13829 27658 69145 138290 155039 310078 775195 1550390 2724313 5448626 10883423 13621565 21766846 27243130 54417115 108834230 2144034331 4288068662 10720171655 21440343310