21074492 has 24 divisors (see below), whose sum is σ = 40007520. Its totient is φ = 9674240.

The previous prime is 21074489. The next prime is 21074519. The reversal of 21074492 is 29447012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 992 + ... + 6567.

It is an arithmetic number, because the mean of its divisors is an integer number (1666980).

Almost surely, 2^21074492 is an apocalyptic number.

It is an amenable number.

21074492 is a deficient number, since it is larger than the sum of its proper divisors (18933028).

21074492 is a wasteful number, since it uses less digits than its factorization.

21074492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7621 (or 7619 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 21074492 is about 4590.6962434907. The cubic root of 21074492 is about 276.2182513693.

The spelling of 21074492 in words is "twenty-one million, seventy-four thousand, four hundred ninety-two".