18949315738800 has 120 divisors (see below), whose sum is σ = 60703093128384. Its totient is φ = 5052974516480.

The previous prime is 18949315738699. The next prime is 18949315738831. The reversal of 18949315738800 is 883751394981.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (120).

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, 36127219 + ... + 36647981.

Almost surely, 2^{18949315738800} is an apocalyptic number.

18949315738800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18949315738800 is an abundant number, since it is smaller than the sum of its proper divisors (41753777389584).

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

18949315738800 is a wasteful number, since it uses less digits than its factorization.

18949315738800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551107 (or 551096 counting only the distinct ones).

The product of its (nonzero) digits is 52254720, while the sum is 66.

The spelling of 18949315738800 in words is "eighteen trillion, nine hundred forty-nine billion, three hundred fifteen million, seven hundred thirty-eight thousand, eight hundred".