20698036 has 6 divisors (see below), whose sum is σ = 36221570. Its totient is φ = 10349016.

The previous prime is 20698019. The next prime is 20698039. The reversal of 20698036 is 63089602.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 20611600 + 86436 = 4540^2 + 294^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20697992 and 20698010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20698039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2587251 + ... + 2587258.

Almost surely, 2^20698036 is an apocalyptic number.

It is an amenable number.

20698036 is a deficient number, since it is larger than the sum of its proper divisors (15523534).

20698036 is a wasteful number, since it uses less digits than its factorization.

20698036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5174513 (or 5174511 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 20698036 is about 4549.5094241028. The cubic root of 20698036 is about 274.5636540160.

The spelling of 20698036 in words is "twenty million, six hundred ninety-eight thousand, thirty-six".