23187165840 has 80 divisors (see below), whose sum is σ = 79866912000. Its totient is φ = 6183243648.

The previous prime is 23187165823. The next prime is 23187165851. The reversal of 23187165840 is 4856178132.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5365240 + ... + 5369559.

It is an arithmetic number, because the mean of its divisors is an integer number (998336400).

Almost surely, 2^23187165840 is an apocalyptic number.

23187165840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23187165840 is an abundant number, since it is smaller than the sum of its proper divisors (56679746160).

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

23187165840 is a wasteful number, since it uses less digits than its factorization.

23187165840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10734821 (or 10734809 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The spelling of 23187165840 in words is "twenty-three billion, one hundred eighty-seven million, one hundred sixty-five thousand, eight hundred forty".