18881406792 has 24 divisors (see below), whose sum is σ = 51137143590. Its totient is φ = 6293802240.

The previous prime is 18881406763. The next prime is 18881406793. The reversal of 18881406792 is 29760418881.

It can be written as a sum of positive squares in only one way, i.e., 18194232996 + 687173796 = 134886^2 + 26214^2 .

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

It is not an unprimeable number, because it can be changed into a prime (18881406793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 131120809 + ... + 131120952.

Almost surely, 2^18881406792 is an apocalyptic number.

18881406792 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18881406792 is an abundant number, since it is smaller than the sum of its proper divisors (32255736798).

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

18881406792 is a wasteful number, since it uses less digits than its factorization.

18881406792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262241773 (or 262241766 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 54.

The spelling of 18881406792 in words is "eighteen billion, eight hundred eighty-one million, four hundred six thousand, seven hundred ninety-two".