18809885124 has 30 divisors (see below), whose sum is σ = 49172756094. Its totient is φ = 6269961600.

The previous prime is 18809885119. The next prime is 18809885137. The reversal of 18809885124 is 42158890881.

It can be written as a sum of positive squares in only one way, i.e., 10903118724 + 7906766400 = 104418^2 + 88920^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 29027277 + ... + 29027924.

Almost surely, 2^18809885124 is an apocalyptic number.

It is an amenable number.

18809885124 is an abundant number, since it is smaller than the sum of its proper divisors (30362870970).

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

18809885124 is a wasteful number, since it uses less digits than its factorization.

18809885124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58055217 (or 58055206 counting only the distinct ones).

The product of its (nonzero) digits is 1474560, while the sum is 54.

The spelling of 18809885124 in words is "eighteen billion, eight hundred nine million, eight hundred eighty-five thousand, one hundred twenty-four".