20874986 has 16 divisors (see below), whose sum is σ = 34993728. Its totient is φ = 9256800.

The previous prime is 20874979. The next prime is 20875009. The reversal of 20874986 is 68947802.

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, 10670 + ... + 12473.

It is an arithmetic number, because the mean of its divisors is an integer number (2187108).

Almost surely, 2^20874986 is an apocalyptic number.

20874986 is a deficient number, since it is larger than the sum of its proper divisors (14118742).

20874986 is a wasteful number, since it uses less digits than its factorization.

20874986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23197.

The product of its (nonzero) digits is 193536, while the sum is 44.

The square root of 20874986 is about 4568.9151885322. The cubic root of 20874986 is about 275.3438607654.

The spelling of 20874986 in words is "twenty million, eight hundred seventy-four thousand, nine hundred eighty-six".