18015500104 has 64 divisors (see below), whose sum is σ = 41031244800. Its totient is φ = 7243504704.

The previous prime is 18015500101. The next prime is 18015500131. The reversal of 18015500104 is 40100551081.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (18015500101) 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 15 ways as a sum of consecutive naturals, for example, 27399 + ... + 191785.

It is an arithmetic number, because the mean of its divisors is an integer number (641113200).

Almost surely, 2^18015500104 is an apocalyptic number.

18015500104 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 18015500104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20515622400).

18015500104 is an abundant number, since it is smaller than the sum of its proper divisors (23015744696).

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

18015500104 is a wasteful number, since it uses less digits than its factorization.

18015500104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164522 (or 164518 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 25.

The spelling of 18015500104 in words is "eighteen billion, fifteen million, five hundred thousand, one hundred four".