20930970 has 32 divisors (see below), whose sum is σ = 52879680. Its totient is φ = 5287680.

The previous prime is 20930969. The next prime is 20930999. The reversal of 20930970 is 7903902.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 17791 + ... + 18930.

It is an arithmetic number, because the mean of its divisors is an integer number (1652490).

Almost surely, 2^20930970 is an apocalyptic number.

20930970 is an abundant number, since it is smaller than the sum of its proper divisors (31948710).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20930970 is a wasteful number, since it uses less digits than its factorization.

20930970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36750.

The product of its (nonzero) digits is 3402, while the sum is 30.

The square root of 20930970 is about 4575.0377047627. The cubic root of 20930970 is about 275.5897865349.

The spelling of 20930970 in words is "twenty million, nine hundred thirty thousand, nine hundred seventy".