21956259336 has 32 divisors (see below), whose sum is σ = 59880708000. Its totient is φ = 6653411840.

The previous prime is 21956259331. The next prime is 21956259371. The reversal of 21956259336 is 63395265912.

It is a hoax number, since the sum of its digits (51) 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 (21956259331) 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, 41583561 + ... + 41584088.

It is an arithmetic number, because the mean of its divisors is an integer number (1871272125).

Almost surely, 2^21956259336 is an apocalyptic number.

It is an amenable number.

21956259336 is an abundant number, since it is smaller than the sum of its proper divisors (37924448664).

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

21956259336 is a wasteful number, since it uses less digits than its factorization.

21956259336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83167669 (or 83167665 counting only the distinct ones).

The product of its digits is 2624400, while the sum is 51.

The spelling of 21956259336 in words is "twenty-one billion, nine hundred fifty-six million, two hundred fifty-nine thousand, three hundred thirty-six".