21074792 has 16 divisors (see below), whose sum is σ = 40790400. Its totient is φ = 10197360.

The previous prime is 21074791. The next prime is 21074797. The reversal of 21074792 is 29747012.

It is not an unprimeable number, because it can be changed into a prime (21074791) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42242 + ... + 42737.

It is an arithmetic number, because the mean of its divisors is an integer number (2549400).

Almost surely, 2^21074792 is an apocalyptic number.

It is an amenable number.

21074792 is a deficient number, since it is larger than the sum of its proper divisors (19715608).

21074792 is a wasteful number, since it uses less digits than its factorization.

21074792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85016 (or 85012 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 21074792 is about 4590.7289181567. The cubic root of 21074792 is about 276.2195620389.

The spelling of 21074792 in words is "twenty-one million, seventy-four thousand, seven hundred ninety-two".