18677443872 has 24 divisors (see below), whose sum is σ = 49028290416. Its totient is φ = 6225814592.

The previous prime is 18677443861. The next prime is 18677443879. The reversal of 18677443872 is 27834477681.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (18677443879) 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 3 ways as a sum of consecutive naturals, for example, 97278258 + ... + 97278449.

It is an arithmetic number, because the mean of its divisors is an integer number (2042845434).

Almost surely, 2^18677443872 is an apocalyptic number.

18677443872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18677443872 is an abundant number, since it is smaller than the sum of its proper divisors (30350846544).

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

18677443872 is a wasteful number, since it uses less digits than its factorization.

18677443872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194556720 (or 194556712 counting only the distinct ones).

The product of its digits is 12644352, while the sum is 57.

The spelling of 18677443872 in words is "eighteen billion, six hundred seventy-seven million, four hundred forty-three thousand, eight hundred seventy-two".