18999999976 has 16 divisors (see below), whose sum is σ = 35637215040. Its totient is φ = 9496742640.

The previous prime is 18999999959. The next prime is 19000000007. The reversal of 18999999976 is 67999999981.

It is a junction number, because it is equal to n+sod(n) for n = 18999999893 and 18999999902.

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, 382290 + ... + 429121.

It is an arithmetic number, because the mean of its divisors is an integer number (2227325940).

Almost surely, 2^18999999976 is an apocalyptic number.

It is an amenable number.

18999999976 is a deficient number, since it is larger than the sum of its proper divisors (16637215064).

18999999976 is a wasteful number, since it uses less digits than its factorization.

18999999976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814344 (or 814340 counting only the distinct ones).

The product of its digits is 1607077584, while the sum is 85.

The spelling of 18999999976 in words is "eighteen billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred seventy-six".