18779720368 has 10 divisors (see below), whose sum is σ = 36385708244. Its totient is φ = 9389860176.

The previous prime is 18779720329. The next prime is 18779720371. The reversal of 18779720368 is 86302797781.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 586866246 + ... + 586866277.

Almost surely, 2^18779720368 is an apocalyptic number.

It is an amenable number.

18779720368 is a deficient number, since it is larger than the sum of its proper divisors (17605987876).

18779720368 is a wasteful number, since it uses less digits than its factorization.

18779720368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1173732531 (or 1173732525 counting only the distinct ones).

The product of its (nonzero) digits is 7112448, while the sum is 58.

The spelling of 18779720368 in words is "eighteen billion, seven hundred seventy-nine million, seven hundred twenty thousand, three hundred sixty-eight".