20632157586 has 12 divisors (see below), whose sum is σ = 44703008142. Its totient is φ = 6877385856.

The previous prime is 20632157549. The next prime is 20632157587. The reversal of 20632157586 is 68575123602.

20632157586 is a `hidden beast` number, since 2 + 0 + 63 + 2 + 1 + 5 + 7 + 586 = 666.

It can be written as a sum of positive squares in only one way, i.e., 20586797361 + 45360225 = 143481^2 + 6735^2 .

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20632157587) 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, 573115471 + ... + 573115506.

Almost surely, 2^20632157586 is an apocalyptic number.

20632157586 is an abundant number, since it is smaller than the sum of its proper divisors (24070850556).

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

20632157586 is a wasteful number, since it uses less digits than its factorization.

20632157586 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1146230985 (or 1146230982 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The spelling of 20632157586 in words is "twenty billion, six hundred thirty-two million, one hundred fifty-seven thousand, five hundred eighty-six".