18948764864 has 14 divisors (see below), whose sum is σ = 37601455404. Its totient is φ = 9474382400.

The previous prime is 18948764851. The next prime is 18948764867. The reversal of 18948764864 is 46846784981.

It is a self number, because there is not a number n which added to its sum of digits gives 18948764864.

It is not an unprimeable number, because it can be changed into a prime (18948764867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 148037162 + ... + 148037289.

Almost surely, 2^18948764864 is an apocalyptic number.

It is an amenable number.

18948764864 is a deficient number, since it is larger than the sum of its proper divisors (18652690540).

18948764864 is an equidigital number, since it uses as much as digits as its factorization.

18948764864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296074463 (or 296074453 counting only the distinct ones).

The product of its digits is 74317824, while the sum is 65.

The spelling of 18948764864 in words is "eighteen billion, nine hundred forty-eight million, seven hundred sixty-four thousand, eight hundred sixty-four".