18219304464 has 120 divisors (see below), whose sum is σ = 50099010720. Its totient is φ = 5704323072.

The previous prime is 18219304451. The next prime is 18219304501. The reversal of 18219304464 is 46440391281.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9140652 + ... + 9142644.

It is an arithmetic number, because the mean of its divisors is an integer number (417491756).

Almost surely, 2^18219304464 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 18219304464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25049505360).

18219304464 is an abundant number, since it is smaller than the sum of its proper divisors (31879706256).

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

18219304464 is a wasteful number, since it uses less digits than its factorization.

18219304464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2697 (or 2674 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 42.

The spelling of 18219304464 in words is "eighteen billion, two hundred nineteen million, three hundred four thousand, four hundred sixty-four".