20698210 has 32 divisors (see below), whose sum is σ = 40506480. Its totient is φ = 7569408.

The previous prime is 20698169. The next prime is 20698211. The reversal of 20698210 is 1289602.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 421201 + 20277009 = 649^2 + 4503^2 .

It is not an unprimeable number, because it can be changed into a prime (20698211) 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 in 15 ways as a sum of consecutive naturals, for example, 13986 + ... + 15394.

Almost surely, 2^20698210 is an apocalyptic number.

20698210 is a deficient number, since it is larger than the sum of its proper divisors (19808270).

20698210 is a wasteful number, since it uses less digits than its factorization.

20698210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1542.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 20698210 is about 4549.5285470035. The cubic root of 20698210 is about 274.5644233956.

The spelling of 20698210 in words is "twenty million, six hundred ninety-eight thousand, two hundred ten".