20698312 has 8 divisors (see below), whose sum is σ = 38809350. Its totient is φ = 10349152.

The previous prime is 20698303. The next prime is 20698313. The reversal of 20698312 is 21389602.

It can be written as a sum of positive squares in only one way, i.e., 13003236 + 7695076 = 3606^2 + 2774^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (20698313) 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, 1293637 + ... + 1293652.

Almost surely, 2^20698312 is an apocalyptic number.

It is an amenable number.

20698312 is a deficient number, since it is larger than the sum of its proper divisors (18111038).

20698312 is a wasteful number, since it uses less digits than its factorization.

20698312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2587295 (or 2587291 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 20698312 is about 4549.5397569425. The cubic root of 20698312 is about 274.5648744093.

The spelling of 20698312 in words is "twenty million, six hundred ninety-eight thousand, three hundred twelve".