21692052 has 36 divisors (see below), whose sum is σ = 55872180. Its totient is φ = 7093632.

The previous prime is 21691979. The next prime is 21692063. The reversal of 21692052 is 25029612.

It can be written as a sum of positive squares in 2 ways, for example, as 14107536 + 7584516 = 3756^2 + 2754^2 .

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, 3777 + ... + 7592.

It is an arithmetic number, because the mean of its divisors is an integer number (1552005).

Almost surely, 2^21692052 is an apocalyptic number.

It is an amenable number.

21692052 is an abundant number, since it is smaller than the sum of its proper divisors (34180128).

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

21692052 is a wasteful number, since it uses less digits than its factorization.

21692052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11432 (or 11427 counting only the distinct ones).

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

The square root of 21692052 is about 4657.4727052340. The cubic root of 21692052 is about 278.8903874344.

The spelling of 21692052 in words is "twenty-one million, six hundred ninety-two thousand, fifty-two".