18071514564 has 12 divisors (see below), whose sum is σ = 42166867344. Its totient is φ = 6023838184.

The previous prime is 18071514541. The next prime is 18071514613. The reversal of 18071514564 is 46541517081.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×18071514564² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 752979762 + ... + 752979785.

It is an arithmetic number, because the mean of its divisors is an integer number (3513905612).

Almost surely, 2^18071514564 is an apocalyptic number.

It is an amenable number.

18071514564 is an abundant number, since it is smaller than the sum of its proper divisors (24095352780).

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

18071514564 is a wasteful number, since it uses less digits than its factorization.

18071514564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1505959554 (or 1505959552 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 42.

The spelling of 18071514564 in words is "eighteen billion, seventy-one million, five hundred fourteen thousand, five hundred sixty-four".