20937992 has 16 divisors (see below), whose sum is σ = 39560400. Its totient is φ = 10388560.

The previous prime is 20937953. The next prime is 20938013. The reversal of 20937992 is 29973902.

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, 8942 + ... + 11037.

It is an arithmetic number, because the mean of its divisors is an integer number (2472525).

Almost surely, 2^20937992 is an apocalyptic number.

It is an amenable number.

20937992 is a deficient number, since it is larger than the sum of its proper divisors (18622408).

20937992 is a wasteful number, since it uses less digits than its factorization.

20937992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20116 (or 20112 counting only the distinct ones).

The product of its (nonzero) digits is 61236, while the sum is 41.

The square root of 20937992 is about 4575.8050657780. The cubic root of 20937992 is about 275.6206017195.

The spelling of 20937992 in words is "twenty million, nine hundred thirty-seven thousand, nine hundred ninety-two".