18115800192 has 576 divisors, whose sum is σ = 64666368000. Its totient is φ = 4864914432.

The previous prime is 18115800163. The next prime is 18115800193. The reversal of 18115800192 is 29100851181.

It is a tau number, because it is divible by the number of its divisors (576).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (18115800193) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 142644033 + ... + 142644159.

It is an arithmetic number, because the mean of its divisors is an integer number (112268000).

Almost surely, 2^18115800192 is an apocalyptic number.

18115800192 is a gapful number since it is divisible by the number (12) 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 18115800192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32333184000).

18115800192 is an abundant number, since it is smaller than the sum of its proper divisors (46550567808).

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

18115800192 is a wasteful number, since it uses less digits than its factorization.

18115800192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206 (or 158 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 36.

The spelling of 18115800192 in words is "eighteen billion, one hundred fifteen million, eight hundred thousand, one hundred ninety-two".