18531283376 has 20 divisors (see below), whose sum is σ = 37794065400. Its totient is φ = 8777976192.

The previous prime is 18531283369. The next prime is 18531283399. The reversal of 18531283376 is 67338213581.

It is a super-2 number, since 2×18531283376² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18531283376.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30478781 + ... + 30479388.

It is an arithmetic number, because the mean of its divisors is an integer number (1889703270).

Almost surely, 2^18531283376 is an apocalyptic number.

18531283376 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18531283376 is an abundant number, since it is smaller than the sum of its proper divisors (19262782024).

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

18531283376 is a wasteful number, since it uses less digits than its factorization.

18531283376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60958196 (or 60958190 counting only the distinct ones).

The product of its digits is 725760, while the sum is 47.

The spelling of 18531283376 in words is "eighteen billion, five hundred thirty-one million, two hundred eighty-three thousand, three hundred seventy-six".