18131927088 has 160 divisors (see below), whose sum is σ = 56127836160. Its totient is φ = 4978955520.

The previous prime is 18131927087. The next prime is 18131927117. The reversal of 18131927088 is 88072913181.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (18131927087) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 191445 + ... + 270027.

It is an arithmetic number, because the mean of its divisors is an integer number (350798976).

Almost surely, 2^18131927088 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18131927088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28063918080).

18131927088 is an abundant number, since it is smaller than the sum of its proper divisors (37995909072).

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

18131927088 is a wasteful number, since it uses less digits than its factorization.

18131927088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78647 (or 78641 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 48.

The spelling of 18131927088 in words is "eighteen billion, one hundred thirty-one million, nine hundred twenty-seven thousand, eighty-eight".