21038092 has 12 divisors (see below), whose sum is σ = 38754520. Its totient is φ = 9965376.

The previous prime is 21038071. The next prime is 21038117. The reversal of 21038092 is 29083012.

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, 138333 + ... + 138484.

Almost surely, 2^21038092 is an apocalyptic number.

It is an amenable number.

21038092 is a deficient number, since it is larger than the sum of its proper divisors (17716428).

21038092 is a wasteful number, since it uses less digits than its factorization.

21038092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276840 (or 276838 counting only the distinct ones).

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

The square root of 21038092 is about 4586.7299898730. The cubic root of 21038092 is about 276.0591310680.

The spelling of 21038092 in words is "twenty-one million, thirty-eight thousand, ninety-two".