21872023403567 has 32 divisors (see below), whose sum is σ = 22614960635904. Its totient is φ = 21146244134400.

The previous prime is 21872023403563. The next prime is 21872023403591. The reversal of 21872023403567 is 76530432027812.

It is a cyclic number.

It is not a de Polignac number, because 21872023403567 - 2² = 21872023403563 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21872023403563) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 294127463 + ... + 294201815.

It is an arithmetic number, because the mean of its divisors is an integer number (706717519872).

Almost surely, 2^{21872023403567} is an apocalyptic number.

21872023403567 is a deficient number, since it is larger than the sum of its proper divisors (742937232337).

21872023403567 is a wasteful number, since it uses less digits than its factorization.

21872023403567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74919.

The product of its (nonzero) digits is 3386880, while the sum is 50.

The spelling of 21872023403567 in words is "twenty-one trillion, eight hundred seventy-two billion, twenty-three million, four hundred three thousand, five hundred sixty-seven".