18038188900 has 72 divisors (see below), whose sum is σ = 39785127200. Its totient is φ = 7097207040.

The previous prime is 18038188873. The next prime is 18038188901. The reversal of 18038188900 is 988183081.

It is not an unprimeable number, because it can be changed into a prime (18038188901) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5914576 + ... + 5917624.

Almost surely, 2^18038188900 is an apocalyptic number.

18038188900 is a gapful number since it is divisible by the number (10) 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 18038188900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19892563600).

18038188900 is an abundant number, since it is smaller than the sum of its proper divisors (21746938300).

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

18038188900 is a wasteful number, since it uses less digits than its factorization.

18038188900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4013 (or 4006 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 46.

The spelling of 18038188900 in words is "eighteen billion, thirty-eight million, one hundred eighty-eight thousand, nine hundred".