21083904696 has 32 divisors (see below), whose sum is σ = 55810337040. Its totient is φ = 6614558208.

The previous prime is 21083904691. The next prime is 21083904697. The reversal of 21083904696 is 69640938012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21083904691) 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, 25837711 + ... + 25838526.

Almost surely, 2^21083904696 is an apocalyptic number.

It is an amenable number.

21083904696 is an abundant number, since it is smaller than the sum of its proper divisors (34726432344).

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

21083904696 is a wasteful number, since it uses less digits than its factorization.

21083904696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51676263 (or 51676259 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 48.

The spelling of 21083904696 in words is "twenty-one billion, eighty-three million, nine hundred four thousand, six hundred ninety-six".