20698040 has 32 divisors (see below), whose sum is σ = 50805360. Its totient is φ = 7526400.

The previous prime is 20698039. The next prime is 20698043. The reversal of 20698040 is 4089602.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 20697994 and 20698012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20698043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23081 + ... + 23960.

Almost surely, 2^20698040 is an apocalyptic number.

20698040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20698040 is an abundant number, since it is smaller than the sum of its proper divisors (30107320).

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

20698040 is a wasteful number, since it uses less digits than its factorization.

20698040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47063 (or 47059 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 20698040 is about 4549.5098637106. The cubic root of 20698040 is about 274.5636717029.

The spelling of 20698040 in words is "twenty million, six hundred ninety-eight thousand, forty".