20626988832 has 72 divisors (see below), whose sum is σ = 58717651356. Its totient is φ = 6868670976.

The previous prime is 20626988831. The next prime is 20626988873. The reversal of 20626988832 is 23888962602.

20626988832 is a `hidden beast` number, since 2 + 0 + 626 + 9 + 8 + 8 + 8 + 3 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 19500446736 + 1126542096 = 139644^2 + 33564^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is not an unprimeable number, because it can be changed into a prime (20626988831) 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 11 ways as a sum of consecutive naturals, for example, 251218 + ... + 323054.

Almost surely, 2^20626988832 is an apocalyptic number.

It is an amenable number.

20626988832 is an abundant number, since it is smaller than the sum of its proper divisors (38090662524).

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

20626988832 is a wasteful number, since it uses less digits than its factorization.

20626988832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72850 (or 72839 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 54.

The spelling of 20626988832 in words is "twenty billion, six hundred twenty-six million, nine hundred eighty-eight thousand, eight hundred thirty-two".