22921585840 has 40 divisors (see below), whose sum is σ = 54733037040. Its totient is φ = 8920832256.

The previous prime is 22921585831. The next prime is 22921585919. The reversal of 22921585840 is 4858512922.

It is a tau number, because it is divible by the number of its divisors (40).

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 7 ways as a sum of consecutive naturals, for example, 3868930 + ... + 3874849.

It is an arithmetic number, because the mean of its divisors is an integer number (1368325926).

Almost surely, 2^22921585840 is an apocalyptic number.

22921585840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22921585840 is an abundant number, since it is smaller than the sum of its proper divisors (31811451200).

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

22921585840 is a wasteful number, since it uses less digits than its factorization.

22921585840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7743829 (or 7743823 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 46.

The spelling of 22921585840 in words is "twenty-two billion, nine hundred twenty-one million, five hundred eighty-five thousand, eight hundred forty".