18949530768 has 40 divisors (see below), whose sum is σ = 55946234688. Its totient is φ = 5414151552.

The previous prime is 18949530727. The next prime is 18949530779. The reversal of 18949530768 is 86703594981.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28198371 + ... + 28199042.

Almost surely, 2^18949530768 is an apocalyptic number.

It is an amenable number.

18949530768 is an abundant number, since it is smaller than the sum of its proper divisors (36996703920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18949530768 is a wasteful number, since it uses less digits than its factorization.

18949530768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56397431 (or 56397425 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 60.

The spelling of 18949530768 in words is "eighteen billion, nine hundred forty-nine million, five hundred thirty thousand, seven hundred sixty-eight".