18103912464 has 80 divisors (see below), whose sum is σ = 51080927040. Its totient is φ = 5479495680.

The previous prime is 18103912457. The next prime is 18103912499. The reversal of 18103912464 is 46421930181.

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 15 ways as a sum of consecutive naturals, for example, 432492 + ... + 472500.

It is an arithmetic number, because the mean of its divisors is an integer number (638511588).

Almost surely, 2^18103912464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18103912464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25540463520).

18103912464 is an abundant number, since it is smaller than the sum of its proper divisors (32977014576).

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

18103912464 is a wasteful number, since it uses less digits than its factorization.

18103912464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40888 (or 40882 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The spelling of 18103912464 in words is "eighteen billion, one hundred three million, nine hundred twelve thousand, four hundred sixty-four".