18336664203264 has 832 divisors, whose sum is σ = 60737850777600. Its totient is φ = 5419538841600.

The previous prime is 18336664203257. The next prime is 18336664203287. The reversal of 18336664203264 is 46230246663381.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 18336664203264.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12314750232 + ... + 12314751720.

Almost surely, 2^{18336664203264} 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 18336664203264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30368925388800).

18336664203264 is an abundant number, since it is smaller than the sum of its proper divisors (42401186574336).

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

18336664203264 is a wasteful number, since it uses less digits than its factorization.

18336664203264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1777 (or 1749 counting only the distinct ones).

The product of its (nonzero) digits is 17915904, while the sum is 54.

The spelling of 18336664203264 in words is "eighteen trillion, three hundred thirty-six billion, six hundred sixty-four million, two hundred three thousand, two hundred sixty-four".