18868623912 has 48 divisors (see below), whose sum is σ = 51629372340. Its totient is φ = 6224698368.

The previous prime is 18868623877. The next prime is 18868623913. The reversal of 18868623912 is 21932686881.

18868623912 is a `hidden beast` number, since 1 + 8 + 8 + 6 + 8 + 623 + 9 + 1 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 18129545316 + 739078596 = 134646^2 + 27186^2 .

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (18868623913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1343863 + ... + 1357830.

Almost surely, 2^18868623912 is an apocalyptic number.

18868623912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18868623912 is an abundant number, since it is smaller than the sum of its proper divisors (32760748428).

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

18868623912 is a wasteful number, since it uses less digits than its factorization.

18868623912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2701802 (or 2701795 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 54.

The spelling of 18868623912 in words is "eighteen billion, eight hundred sixty-eight million, six hundred twenty-three thousand, nine hundred twelve".