20707541136 has 50 divisors (see below), whose sum is σ = 59933635542. Its totient is φ = 6902513280.

The previous prime is 20707541093. The next prime is 20707541137. The reversal of 20707541136 is 63114570702.

It is a happy number.

20707541136 is a `hidden beast` number, since 207 + 0 + 7 + 5 + 411 + 36 = 666.

It can be written as a sum of positive squares in only one way, i.e., 20529158400 + 178382736 = 143280^2 + 13356^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 20707541136.

It is not an unprimeable number, because it can be changed into a prime (20707541137) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 7987725 + ... + 7990316.

Almost surely, 2^20707541136 is an apocalyptic number.

It is an amenable number.

20707541136 is an abundant number, since it is smaller than the sum of its proper divisors (39226094406).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20707541136 is a wasteful number, since it uses less digits than its factorization.

20707541136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15978061 (or 15978046 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The spelling of 20707541136 in words is "twenty billion, seven hundred seven million, five hundred forty-one thousand, one hundred thirty-six".