21372650956 has 12 divisors (see below), whose sum is σ = 38691868320. Its totient is φ = 10317831440.

The previous prime is 21372650951. The next prime is 21372650969. The reversal of 21372650956 is 65905627312.

It is not an unprimeable number, because it can be changed into a prime (21372650951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92123380 + ... + 92123611.

It is an arithmetic number, because the mean of its divisors is an integer number (3224322360).

Almost surely, 2^21372650956 is an apocalyptic number.

It is an amenable number.

21372650956 is a deficient number, since it is larger than the sum of its proper divisors (17319217364).

21372650956 is a wasteful number, since it uses less digits than its factorization.

21372650956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184247024 (or 184247022 counting only the distinct ones).

The product of its (nonzero) digits is 680400, while the sum is 46.

The spelling of 21372650956 in words is "twenty-one billion, three hundred seventy-two million, six hundred fifty thousand, nine hundred fifty-six".