18680701856 has 24 divisors (see below), whose sum is σ = 37046090340. Its totient is φ = 9272171008.

The previous prime is 18680701847. The next prime is 18680701859. The reversal of 18680701856 is 65810708681.

It can be written as a sum of positive squares in 2 ways, for example, as 18414490000 + 266211856 = 135700^2 + 16316^2 .

It is not an unprimeable number, because it can be changed into a prime (18680701859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2126171 + ... + 2134938.

Almost surely, 2^18680701856 is an apocalyptic number.

18680701856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18680701856 is a deficient number, since it is larger than the sum of its proper divisors (18365388484).

18680701856 is a wasteful number, since it uses less digits than its factorization.

18680701856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4261256 (or 4261248 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 50.

The spelling of 18680701856 in words is "eighteen billion, six hundred eighty million, seven hundred one thousand, eight hundred fifty-six".