18976991048 has 16 divisors (see below), whose sum is σ = 35583408000. Its totient is φ = 9488082256.

The previous prime is 18976991017. The next prime is 18976991107. The reversal of 18976991048 is 84019967981.

It is a Cunningham number, because it is equal to 137757²-1.

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, 241073 + ... + 309951.

It is an arithmetic number, because the mean of its divisors is an integer number (2223963000).

Almost surely, 2^18976991048 is an apocalyptic number.

It is an amenable number.

18976991048 is a deficient number, since it is larger than the sum of its proper divisors (16606416952).

18976991048 is a wasteful number, since it uses less digits than its factorization.

18976991048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103324 (or 103320 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 62.

The spelling of 18976991048 in words is "eighteen billion, nine hundred seventy-six million, nine hundred ninety-one thousand, forty-eight".