20737990 has 48 divisors (see below), whose sum is σ = 46221408. Its totient is φ = 6559488.

The previous prime is 20737967. The next prime is 20738021. The reversal of 20737990 is 9973702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10954 + ... + 12706.

It is an arithmetic number, because the mean of its divisors is an integer number (962946).

Almost surely, 2^20737990 is an apocalyptic number.

20737990 is an abundant number, since it is smaller than the sum of its proper divisors (25483418).

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

20737990 is a wasteful number, since it uses less digits than its factorization.

20737990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1793 (or 1780 counting only the distinct ones).

The product of its (nonzero) digits is 23814, while the sum is 37.

The square root of 20737990 is about 4553.8983300025. The cubic root of 20737990 is about 274.7402064399.

The spelling of 20737990 in words is "twenty million, seven hundred thirty-seven thousand, nine hundred ninety".