18448736864 has 24 divisors (see below), whose sum is σ = 37492596288. Its totient is φ = 8926807680.

The previous prime is 18448736857. The next prime is 18448736897. The reversal of 18448736864 is 46863784481.

It is a super-2 number, since 2×18448736864² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9297767 + ... + 9299750.

It is an arithmetic number, because the mean of its divisors is an integer number (1562191512).

Almost surely, 2^18448736864 is an apocalyptic number.

It is an amenable number.

18448736864 is an abundant number, since it is smaller than the sum of its proper divisors (19043859424).

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

18448736864 is a wasteful number, since it uses less digits than its factorization.

18448736864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18597558 (or 18597550 counting only the distinct ones).

The product of its digits is 24772608, while the sum is 59.

The spelling of 18448736864 in words is "eighteen billion, four hundred forty-eight million, seven hundred thirty-six thousand, eight hundred sixty-four".