20974670 has 32 divisors (see below), whose sum is σ = 40171680. Its totient is φ = 7862400.

The previous prime is 20974663. The next prime is 20974687. The reversal of 20974670 is 7647902.

It is a self number, because there is not a number n which added to its sum of digits gives 20974670.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18644 + ... + 19736.

It is an arithmetic number, because the mean of its divisors is an integer number (1255365).

Almost surely, 2^20974670 is an apocalyptic number.

20974670 is a deficient number, since it is larger than the sum of its proper divisors (19197010).

20974670 is a wasteful number, since it uses less digits than its factorization.

20974670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1220.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 20974670 is about 4579.8111314769. The cubic root of 20974670 is about 275.7814467399.

The spelling of 20974670 in words is "twenty million, nine hundred seventy-four thousand, six hundred seventy".