18864054042240 has 128 divisors (see below), whose sum is σ = 65595460720320. Its totient is φ = 4573104005120.

The previous prime is 18864054042233. The next prime is 18864054042259. The reversal of 18864054042240 is 4224045046881.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 18864054042240.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 446571069 + ... + 446613308.

Almost surely, 2^{18864054042240} is an apocalyptic number.

18864054042240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18864054042240 is an abundant number, since it is smaller than the sum of its proper divisors (46731406678080).

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

18864054042240 is a wasteful number, since it uses less digits than its factorization.

18864054042240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 893184410 (or 893184398 counting only the distinct ones).

The product of its (nonzero) digits is 1966080, while the sum is 48.

The spelling of 18864054042240 in words is "eighteen trillion, eight hundred sixty-four billion, fifty-four million, forty-two thousand, two hundred forty".