20937490 has 16 divisors (see below), whose sum is σ = 43071552. Its totient is φ = 7178544.

The previous prime is 20937481. The next prime is 20937503. The reversal of 20937490 is 9473902.

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, 149484 + ... + 149623.

It is an arithmetic number, because the mean of its divisors is an integer number (2691972).

Almost surely, 2^20937490 is an apocalyptic number.

20937490 is an abundant number, since it is smaller than the sum of its proper divisors (22134062).

20937490 is a wasteful number, since it uses less digits than its factorization.

20937490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299121.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 20937490 is about 4575.7502117139. The cubic root of 20937490 is about 275.6183989829.

The spelling of 20937490 in words is "twenty million, nine hundred thirty-seven thousand, four hundred ninety".