20930972 has 12 divisors (see below), whose sum is σ = 37320696. Its totient is φ = 10267920.

The previous prime is 20930969. The next prime is 20930999. The reversal of 20930972 is 27903902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49154 + ... + 49577.

It is an arithmetic number, because the mean of its divisors is an integer number (3110058).

Almost surely, 2^20930972 is an apocalyptic number.

It is an amenable number.

20930972 is a deficient number, since it is larger than the sum of its proper divisors (16389724).

20930972 is a wasteful number, since it uses less digits than its factorization.

20930972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98788 (or 98786 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 20930972 is about 4575.0379233401. The cubic root of 20930972 is about 275.5897953127.

The spelling of 20930972 in words is "twenty million, nine hundred thirty thousand, nine hundred seventy-two".