18983997484 has 12 divisors (see below), whose sum is σ = 33405543808. Its totient is φ = 9439556400.

The previous prime is 18983997469. The next prime is 18983997493. The reversal of 18983997484 is 48479938981.

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, 13109772 + ... + 13111219.

Almost surely, 2^18983997484 is an apocalyptic number.

It is an amenable number.

18983997484 is a deficient number, since it is larger than the sum of its proper divisors (14421546324).

18983997484 is a wasteful number, since it uses less digits than its factorization.

18983997484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26221176 (or 26221174 counting only the distinct ones).

The product of its digits is 125411328, while the sum is 70.

The spelling of 18983997484 in words is "eighteen billion, nine hundred eighty-three million, nine hundred ninety-seven thousand, four hundred eighty-four".