20936353636 has 27 divisors (see below), whose sum is σ = 40278325017. Its totient is φ = 9515077440.

The previous prime is 20936353601. The next prime is 20936353649. The reversal of 20936353636 is 63635363902.

The square root of 20936353636 is 144694.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 20733120100 + 203233536 = 143990^2 + 14256^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3179980 + ... + 3186556.

Almost surely, 2^20936353636 is an apocalyptic number.

20936353636 is the 144694-th square number.

It is an amenable number.

20936353636 is a deficient number, since it is larger than the sum of its proper divisors (19341971381).

20936353636 is an frugal number, since it uses more digits than its factorization.

20936353636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13180 (or 6590 counting only the distinct ones).

The product of its (nonzero) digits is 1574640, while the sum is 46.

The spelling of 20936353636 in words is "twenty billion, nine hundred thirty-six million, three hundred fifty-three thousand, six hundred thirty-six".