20936064249 has 63 divisors (see below), whose sum is σ = 32955282367. Its totient is φ = 13293235296.

The previous prime is 20936064197. The next prime is 20936064263. The reversal of 20936064249 is 94246063902.

The square root of 20936064249 is 144693.

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

20936064249 is a `hidden beast` number, since 209 + 360 + 6 + 42 + 49 = 666.

It can be written as a sum of positive squares in only one way, i.e., 4251692025 + 16684372224 = 65205^2 + 129168^2 .

It is not a de Polignac number, because 20936064249 - 2²⁷ = 20801846521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20936064049) by changing a digit.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 89854237 + ... + 89854469.

Almost surely, 2^20936064249 is an apocalyptic number.

20936064249 is the 144693-rd square number.

20936064249 is the 72347-th centered octagonal number.

It is an amenable number.

20936064249 is a deficient number, since it is larger than the sum of its proper divisors (12019218118).

20936064249 is an frugal number, since it uses more digits than its factorization.

20936064249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530 (or 259 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 45.

The spelling of 20936064249 in words is "twenty billion, nine hundred thirty-six million, sixty-four thousand, two hundred forty-nine".