21052692 has 36 divisors (see below), whose sum is σ = 53391520. Its totient is φ = 6994512.

The previous prime is 21052687. The next prime is 21052709. The reversal of 21052692 is 29625012.

It is a tau number, because it is divible by the number of its divisors (36).

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, 12873 + ... + 14415.

Almost surely, 2^21052692 is an apocalyptic number.

It is an amenable number.

21052692 is an abundant number, since it is smaller than the sum of its proper divisors (32338828).

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

21052692 is a wasteful number, since it uses less digits than its factorization.

21052692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1932 (or 1927 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 21052692 is about 4588.3212616381. The cubic root of 21052692 is about 276.1229760738.

The spelling of 21052692 in words is "twenty-one million, fifty-two thousand, six hundred ninety-two".