20974570 has 16 divisors (see below), whose sum is σ = 37833768. Its totient is φ = 8372160.

The previous prime is 20974567. The next prime is 20974589. The reversal of 20974570 is 7547902.

It can be written as a sum of positive squares in 4 ways, for example, as 13417569 + 7557001 = 3663^2 + 2749^2 .

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, 3472 + ... + 7348.

Almost surely, 2^20974570 is an apocalyptic number.

20974570 is a deficient number, since it is larger than the sum of its proper divisors (16859198).

20974570 is a wasteful number, since it uses less digits than its factorization.

20974570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4425.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 20974570 is about 4579.8002139831. The cubic root of 20974570 is about 275.7810084623.

The spelling of 20974570 in words is "twenty million, nine hundred seventy-four thousand, five hundred seventy".