18583984812 has 12 divisors (see below), whose sum is σ = 43362631256. Its totient is φ = 6194661600.

The previous prime is 18583984789. The next prime is 18583984813. The reversal of 18583984812 is 21848938581.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (18583984813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 774332689 + ... + 774332712.

Almost surely, 2^18583984812 is an apocalyptic number.

18583984812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18583984812 is an abundant number, since it is smaller than the sum of its proper divisors (24778646444).

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

18583984812 is a wasteful number, since it uses less digits than its factorization.

18583984812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1548665408 (or 1548665406 counting only the distinct ones).

The product of its digits is 4423680, while the sum is 57.

The spelling of 18583984812 in words is "eighteen billion, five hundred eighty-three million, nine hundred eighty-four thousand, eight hundred twelve".