20974675 has 12 divisors (see below), whose sum is σ = 26255016. Its totient is φ = 16620800.

The previous prime is 20974663. The next prime is 20974687. The reversal of 20974675 is 57647902.

It is an interprime number because it is at equal distance from previous prime (20974663) and next prime (20974687).

It is a de Polignac number, because none of the positive numbers 2^k-20974675 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1246 + ... + 6595.

It is an arithmetic number, because the mean of its divisors is an integer number (2187918).

Almost surely, 2^20974675 is an apocalyptic number.

20974675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20974675 is a deficient number, since it is larger than the sum of its proper divisors (5280341).

20974675 is a wasteful number, since it uses less digits than its factorization.

20974675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7958 (or 7953 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 40.

The square root of 20974675 is about 4579.8116773509. The cubic root of 20974675 is about 275.7814686538.

The spelling of 20974675 in words is "twenty million, nine hundred seventy-four thousand, six hundred seventy-five".