18336878240000 has 90 divisors (see below), whose sum is σ = 45738019609590. Its totient is φ = 7334751232000.

The previous prime is 18336878239963. The next prime is 18336878240011. The reversal of 18336878240000 is 4287863381.

It can be written as a sum of positive squares in 5 ways, for example, as 1523466866944 + 16813411373056 = 1234288^2 + 4100416^2 .

It is a super-2 number, since 2×18336878240000² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 57142745 + ... + 57462744.

Almost surely, 2^{18336878240000} is an apocalyptic number.

18336878240000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18336878240000 is an abundant number, since it is smaller than the sum of its proper divisors (27401141369590).

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

18336878240000 is an frugal number, since it uses more digits than its factorization.

18336878240000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114605525 (or 114605496 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 50.

The spelling of 18336878240000 in words is "eighteen trillion, three hundred thirty-six billion, eight hundred seventy-eight million, two hundred forty thousand".