20842407992 has 64 divisors (see below), whose sum is σ = 45150566400. Its totient is φ = 8835321600.

The previous prime is 20842407947. The next prime is 20842408003. The reversal of 20842407992 is 29970424802.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2015828 + ... + 2026140.

It is an arithmetic number, because the mean of its divisors is an integer number (705477600).

Almost surely, 2^20842407992 is an apocalyptic number.

It is an amenable number.

20842407992 is an abundant number, since it is smaller than the sum of its proper divisors (24308158408).

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

20842407992 is a wasteful number, since it uses less digits than its factorization.

20842407992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10716 (or 10712 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 47.

The spelling of 20842407992 in words is "twenty billion, eight hundred forty-two million, four hundred seven thousand, nine hundred ninety-two".