20698816 has 14 divisors (see below), whose sum is σ = 41074340. Its totient is φ = 10349376.

The previous prime is 20698801. The next prime is 20698817. The reversal of 20698816 is 61889602.

It is not an unprimeable number, because it can be changed into a prime (20698817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161646 + ... + 161773.

Almost surely, 2^20698816 is an apocalyptic number.

It is an amenable number.

20698816 is a deficient number, since it is larger than the sum of its proper divisors (20375524).

20698816 is an equidigital number, since it uses as much as digits as its factorization.

20698816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323431 (or 323421 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 20698816 is about 4549.5951468235. The cubic root of 20698816 is about 274.5671029255.

The spelling of 20698816 in words is "twenty million, six hundred ninety-eight thousand, eight hundred sixteen".