21690022204 has 36 divisors (see below), whose sum is σ = 40202763384. Its totient is φ = 10237723488.

The previous prime is 21690022199. The next prime is 21690022219. The reversal of 21690022204 is 40222009612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 382114 + ... + 435190.

Almost surely, 2^21690022204 is an apocalyptic number.

It is an amenable number.

21690022204 is a deficient number, since it is larger than the sum of its proper divisors (18512741180).

21690022204 is a wasteful number, since it uses less digits than its factorization.

21690022204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53402 (or 53381 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The spelling of 21690022204 in words is "twenty-one billion, six hundred ninety million, twenty-two thousand, two hundred four".