18401871124 has 24 divisors (see below), whose sum is σ = 39634800128. Its totient is φ = 7279860960.

The previous prime is 18401871109. The next prime is 18401871181. The reversal of 18401871124 is 42117810481.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 25276932 + ... + 25277659.

Almost surely, 2^18401871124 is an apocalyptic number.

18401871124 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18401871124 is an abundant number, since it is smaller than the sum of its proper divisors (21232929004).

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

18401871124 is a wasteful number, since it uses less digits than its factorization.

18401871124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50554615 (or 50554613 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 37.

The spelling of 18401871124 in words is "eighteen billion, four hundred one million, eight hundred seventy-one thousand, one hundred twenty-four".