21169204 has 12 divisors (see below), whose sum is σ = 42338464. Its totient is φ = 9072504.

The previous prime is 21169157. The next prime is 21169219. The reversal of 21169204 is 40296112.

21169204 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 377994 + ... + 378049.

Almost surely, 2^21169204 is an apocalyptic number.

It is an amenable number.

21169204 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21169204 is a wasteful number, since it uses less digits than its factorization.

21169204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756054 (or 756052 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 21169204 is about 4601.0003260161. Note that the first 3 decimals coincide. The cubic root of 21169204 is about 276.6314221003.

The spelling of 21169204 in words is "twenty-one million, one hundred sixty-nine thousand, two hundred four".