20622912492 has 72 divisors (see below), whose sum is σ = 59550226176. Its totient is φ = 5439006144.

The previous prime is 20622912469. The next prime is 20622912509. The reversal of 20622912492 is 29421922602.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 20622912492.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 712168 + ... + 740559.

Almost surely, 2^20622912492 is an apocalyptic number.

It is an amenable number.

20622912492 is an abundant number, since it is smaller than the sum of its proper divisors (38927313684).

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

20622912492 is a wasteful number, since it uses less digits than its factorization.

20622912492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1452767 (or 1452752 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The spelling of 20622912492 in words is "twenty billion, six hundred twenty-two million, nine hundred twelve thousand, four hundred ninety-two".