18108499320 has 320 divisors, whose sum is σ = 62052439680. Its totient is φ = 4735770624.

The previous prime is 18108499301. The next prime is 18108499333. The reversal of 18108499320 is 2399480181.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 49341777 + ... + 49342143.

It is an arithmetic number, because the mean of its divisors is an integer number (193913874).

Almost surely, 2^18108499320 is an apocalyptic number.

18108499320 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 18108499320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31026219840).

18108499320 is an abundant number, since it is smaller than the sum of its proper divisors (43943940360).

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

18108499320 is a wasteful number, since it uses less digits than its factorization.

18108499320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644 (or 631 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The spelling of 18108499320 in words is "eighteen billion, one hundred eight million, four hundred ninety-nine thousand, three hundred twenty".