20698020 has 72 divisors (see below), whose sum is σ = 71757504. Its totient is φ = 4730688.

The previous prime is 20698019. The next prime is 20698039. The reversal of 20698020 is 2089602.

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, 6954 + ... + 9473.

It is an arithmetic number, because the mean of its divisors is an integer number (996632).

Almost surely, 2^20698020 is an apocalyptic number.

20698020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20698020 is an abundant number, since it is smaller than the sum of its proper divisors (51059484).

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

20698020 is a wasteful number, since it uses less digits than its factorization.

20698020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16449 (or 16444 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 20698020 is about 4549.5076656711. The cubic root of 20698020 is about 274.5635832682.

The spelling of 20698020 in words is "twenty million, six hundred ninety-eight thousand, twenty".