18737982984 has 256 divisors, whose sum is σ = 57028608000. Its totient is φ = 5122656000.

The previous prime is 18737982961. The next prime is 18737983003. The reversal of 18737982984 is 48928973781.

It is a super-2 number, since 2×18737982984² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 25774029 + ... + 25774755.

It is an arithmetic number, because the mean of its divisors is an integer number (222768000).

Almost surely, 2^18737982984 is an apocalyptic number.

18737982984 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18737982984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28514304000).

18737982984 is an abundant number, since it is smaller than the sum of its proper divisors (38290625016).

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

18737982984 is a wasteful number, since it uses less digits than its factorization.

18737982984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 889 (or 871 counting only the distinct ones).

The product of its digits is 48771072, while the sum is 66.

The spelling of 18737982984 in words is "eighteen billion, seven hundred thirty-seven million, nine hundred eighty-two thousand, nine hundred eighty-four".