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21213675357 = 3744912591787
BaseRepresentation
bin10011110000011011…
…101111111101011101
32000202102021100211220
4103300123233331131
5321421200102412
613425002403553
71350460160010
oct236033577535
960672240756
1021213675357
118aa6626306
1241405005b9
132000c79834
141053575377
158425a868c
hex4f06eff5d

21213675357 has 32 divisors (see below), whose sum is σ = 32441472000. Its totient is φ = 12078732288.

The previous prime is 21213675331. The next prime is 21213675377. The reversal of 21213675357 is 75357631212.

It is not a de Polignac number, because 21213675357 - 26 = 21213675293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21213675377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11870218 + ... + 11872004.

It is an arithmetic number, because the mean of its divisors is an integer number (1013796000).

Almost surely, 221213675357 is an apocalyptic number.

It is an amenable number.

21213675357 is a deficient number, since it is larger than the sum of its proper divisors (11227796643).

21213675357 is a wasteful number, since it uses less digits than its factorization.

21213675357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3505.

The product of its digits is 264600, while the sum is 42.

The spelling of 21213675357 in words is "twenty-one billion, two hundred thirteen million, six hundred seventy-five thousand, three hundred fifty-seven".

Divisors: 1 3 7 21 449 1259 1347 1787 3143 3777 5361 8813 9429 12509 26439 37527 565291 802363 1695873 2249833 2407089 3957037 5616541 6749499 11871111 15748831 16849623 47246493 1010175017 3030525051 7071225119 21213675357