18997737250880 has 112 divisors (see below), whose sum is σ = 46325735136000. Its totient is φ = 7418600656896.

The previous prime is 18997737250873. The next prime is 18997737250883. The reversal of 18997737250880 is 8805273779981.

It is a junction number, because it is equal to n+sod(n) for n = 18997737250798 and 18997737250807.

It is not an unprimeable number, because it can be changed into a prime (18997737250883) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1971950 + ... + 6471789.

Almost surely, 2^{18997737250880} is an apocalyptic number.

18997737250880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18997737250880 is an abundant number, since it is smaller than the sum of its proper divisors (27327997885120).

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

18997737250880 is an equidigital number, since it uses as much as digits as its factorization.

18997737250880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8443924 (or 8443914 counting only the distinct ones).

The product of its (nonzero) digits is 426746880, while the sum is 74.

The spelling of 18997737250880 in words is "eighteen trillion, nine hundred ninety-seven billion, seven hundred thirty-seven million, two hundred fifty thousand, eight hundred eighty".