18182238564 has 96 divisors (see below), whose sum is σ = 49443803136. Its totient is φ = 5093308800.

The previous prime is 18182238539. The next prime is 18182238577. The reversal of 18182238564 is 46583228181.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 863449 + ... + 884255.

It is an arithmetic number, because the mean of its divisors is an integer number (515039616).

Almost surely, 2^18182238564 is an apocalyptic number.

18182238564 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 18182238564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24721901568).

18182238564 is an abundant number, since it is smaller than the sum of its proper divisors (31261564572).

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

18182238564 is a wasteful number, since it uses less digits than its factorization.

18182238564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21025 (or 21023 counting only the distinct ones).

The product of its digits is 737280, while the sum is 48.

The spelling of 18182238564 in words is "eighteen billion, one hundred eighty-two million, two hundred thirty-eight thousand, five hundred sixty-four".