18983794786 has 64 divisors (see below), whose sum is σ = 34405171200. Its totient is φ = 7818932880.

The previous prime is 18983794733. The next prime is 18983794789. The reversal of 18983794786 is 68749738981.

It is not an unprimeable number, because it can be changed into a prime (18983794789) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1155135 + ... + 1171453.

It is an arithmetic number, because the mean of its divisors is an integer number (537580800).

Almost surely, 2^18983794786 is an apocalyptic number.

18983794786 is a deficient number, since it is larger than the sum of its proper divisors (15421376414).

18983794786 is a wasteful number, since it uses less digits than its factorization.

18983794786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16396 (or 16374 counting only the distinct ones).

The product of its digits is 146313216, while the sum is 70.

The spelling of 18983794786 in words is "eighteen billion, nine hundred eighty-three million, seven hundred ninety-four thousand, seven hundred eighty-six".