18891974800320 has 112 divisors (see below), whose sum is σ = 60010822320000. Its totient is φ = 5035440854016.

The previous prime is 18891974800297. The next prime is 18891974800367. The reversal of 18891974800320 is 2300847919881.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

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, 2724070 + ... + 6723429.

Almost surely, 2^{18891974800320} is an apocalyptic number.

18891974800320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18891974800320 is an abundant number, since it is smaller than the sum of its proper divisors (41118847519680).

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

18891974800320 is a wasteful number, since it uses less digits than its factorization.

18891974800320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9449602 (or 9449592 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 60.

The spelling of 18891974800320 in words is "eighteen trillion, eight hundred ninety-one billion, nine hundred seventy-four million, eight hundred thousand, three hundred twenty".