20366868537 has 6 divisors (see below), whose sum is σ = 29418810122. Its totient is φ = 13577912352.

The previous prime is 20366868521. The next prime is 20366868539. The reversal of 20366868537 is 73586866302.

20366868537 is a `hidden beast` number, since 20 + 3 + 6 + 6 + 86 + 8 + 537 = 666.

It can be written as a sum of positive squares in only one way, i.e., 15327430416 + 5039438121 = 123804^2 + 70989^2 .

It is not a de Polignac number, because 20366868537 - 2⁴ = 20366868521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20366868539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1131492688 + ... + 1131492705.

Almost surely, 2^20366868537 is an apocalyptic number.

It is an amenable number.

20366868537 is a deficient number, since it is larger than the sum of its proper divisors (9051941585).

20366868537 is a wasteful number, since it uses less digits than its factorization.

20366868537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2262985399 (or 2262985396 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 54.

The spelling of 20366868537 in words is "twenty billion, three hundred sixty-six million, eight hundred sixty-eight thousand, five hundred thirty-seven".