18964264508 has 96 divisors (see below), whose sum is σ = 40417198080. Its totient is φ = 7615270080.

The previous prime is 18964264489. The next prime is 18964264511. The reversal of 18964264508 is 80546246981.

It is a self number, because there is not a number n which added to its sum of digits gives 18964264508.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3428441 + ... + 3433967.

It is an arithmetic number, because the mean of its divisors is an integer number (421012480).

Almost surely, 2^18964264508 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 18964264508, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20208599040).

18964264508 is an abundant number, since it is smaller than the sum of its proper divisors (21452933572).

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

18964264508 is a wasteful number, since it uses less digits than its factorization.

18964264508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5695 (or 5693 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 53.

The spelling of 18964264508 in words is "eighteen billion, nine hundred sixty-four million, two hundred sixty-four thousand, five hundred eight".