40322520021 has 32 divisors (see below), whose sum is σ = 61602684928. Its totient is φ = 22981968000.

The previous prime is 40322520013. The next prime is 40322520023. The reversal of 40322520021 is 12002522304.

It is not a de Polignac number, because 40322520021 - 2³ = 40322520013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40322520021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40322520023) 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 31 ways as a sum of consecutive naturals, for example, 24333825 + ... + 24335481.

It is an arithmetic number, because the mean of its divisors is an integer number (1925083904).

Almost surely, 2^40322520021 is an apocalyptic number.

It is an amenable number.

40322520021 is a deficient number, since it is larger than the sum of its proper divisors (21280164907).

40322520021 is a wasteful number, since it uses less digits than its factorization.

40322520021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3961.

The product of its (nonzero) digits is 960, while the sum is 21.

The spelling of 40322520021 in words is "forty billion, three hundred twenty-two million, five hundred twenty thousand, twenty-one".