21802164926 has 16 divisors (see below), whose sum is σ = 32804538624. Its totient is φ = 10867364184.

The previous prime is 21802164911. The next prime is 21802164929. The reversal of 21802164926 is 62946120812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21802164929) 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, 1019621 + ... + 1040783.

It is an arithmetic number, because the mean of its divisors is an integer number (2050283664).

Almost surely, 2^21802164926 is an apocalyptic number.

21802164926 is a deficient number, since it is larger than the sum of its proper divisors (11002373698).

21802164926 is a wasteful number, since it uses less digits than its factorization.

21802164926 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22735.

The product of its (nonzero) digits is 82944, while the sum is 41.

The spelling of 21802164926 in words is "twenty-one billion, eight hundred two million, one hundred sixty-four thousand, nine hundred twenty-six".