21119564964 has 24 divisors (see below), whose sum is σ = 49307469120. Its totient is φ = 7035785824.

The previous prime is 21119564951. The next prime is 21119564971. The reversal of 21119564964 is 46946591112.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 486984 + ... + 528575.

It is an arithmetic number, because the mean of its divisors is an integer number (2054477880).

Almost surely, 2^21119564964 is an apocalyptic number.

It is an amenable number.

21119564964 is an abundant number, since it is smaller than the sum of its proper divisors (28187904156).

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

21119564964 is a wasteful number, since it uses less digits than its factorization.

21119564964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1017299 (or 1017297 counting only the distinct ones).

The product of its digits is 466560, while the sum is 48.

The spelling of 21119564964 in words is "twenty-one billion, one hundred nineteen million, five hundred sixty-four thousand, nine hundred sixty-four".