18219262464 has 240 divisors, whose sum is σ = 58459425024. Its totient is φ = 5424537600.

The previous prime is 18219262403. The next prime is 18219262487. The reversal of 18219262464 is 46426291281.

It is a happy number.

18219262464 is a `hidden beast` number, since 1 + 8 + 2 + 19 + 2 + 624 + 6 + 4 = 666.

It is a nude number because it is divisible by every one of its digits.

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, 1852119 + ... + 1861929.

Almost surely, 2^18219262464 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 18219262464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29229712512).

18219262464 is an abundant number, since it is smaller than the sum of its proper divisors (40240162560).

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

18219262464 is a wasteful number, since it uses less digits than its factorization.

18219262464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9879 (or 9860 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The spelling of 18219262464 in words is "eighteen billion, two hundred nineteen million, two hundred sixty-two thousand, four hundred sixty-four".