18187522080 has 576 divisors, whose sum is σ = 76014288000. Its totient is φ = 3610607616.

The previous prime is 18187522069. The next prime is 18187522081. The reversal of 18187522080 is 8022578181.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (18187522081) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5196171 + ... + 5199669.

It is an arithmetic number, because the mean of its divisors is an integer number (131969250).

Almost surely, 2^18187522080 is an apocalyptic number.

18187522080 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 18187522080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38007144000).

18187522080 is an abundant number, since it is smaller than the sum of its proper divisors (57826765920).

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

18187522080 is a wasteful number, since it uses less digits than its factorization.

18187522080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3561 (or 3546 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 42.

The spelling of 18187522080 in words is "eighteen billion, one hundred eighty-seven million, five hundred twenty-two thousand, eighty".