18324718280 has 32 divisors (see below), whose sum is σ = 44978855040. Its totient is φ = 6663533760.

The previous prime is 18324718249. The next prime is 18324718297. The reversal of 18324718280 is 8281742381.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20823104 + ... + 20823983.

It is an arithmetic number, because the mean of its divisors is an integer number (1405589220).

Almost surely, 2^18324718280 is an apocalyptic number.

18324718280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18324718280 is an abundant number, since it is smaller than the sum of its proper divisors (26654136760).

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

18324718280 is a wasteful number, since it uses less digits than its factorization.

18324718280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41647109 (or 41647105 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 44.

The spelling of 18324718280 in words is "eighteen billion, three hundred twenty-four million, seven hundred eighteen thousand, two hundred eighty".