18003123124 has 72 divisors (see below), whose sum is σ = 39519385920. Its totient is φ = 7131196800.

The previous prime is 18003123119. The next prime is 18003123137. The reversal of 18003123124 is 42132130081.

It is a happy number.

It is a super-2 number, since 2×18003123124² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 93729 + ... + 211639.

It is an arithmetic number, because the mean of its divisors is an integer number (548880360).

Almost surely, 2^18003123124 is an apocalyptic number.

18003123124 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18003123124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19759692960).

18003123124 is an abundant number, since it is smaller than the sum of its proper divisors (21516262796).

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

18003123124 is a wasteful number, since it uses less digits than its factorization.

18003123124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117989 (or 117980 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The spelling of 18003123124 in words is "eighteen billion, three million, one hundred twenty-three thousand, one hundred twenty-four".