18396224402724 has 81 divisors (see below), whose sum is σ = 54094189557681. Its totient is φ = 5256012646080.

The previous prime is 18396224402707. The next prime is 18396224402741. The reversal of 18396224402724 is 42720442269381.

The square root of 18396224402724 is 4289082.

It is a perfect power (a square), and thus also a powerful number.

18396224402724 is a `hidden beast` number, since 1 + 8 + 3 + 9 + 6 + 224 + 402 + 7 + 2 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (18396224402707) and next prime (18396224402741).

It can be written as a sum of positive squares in only one way, i.e., 301750265124 + 18094474137600 = 549318^2 + 4253760^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 180090384 + ... + 180192504.

Almost surely, 2^{18396224402724} is an apocalyptic number.

18396224402724 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18396224402724 is the 4289082-nd square number.

It is an amenable number.

18396224402724 is an abundant number, since it is smaller than the sum of its proper divisors (35697965154957).

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

18396224402724 is an frugal number, since it uses more digits than its factorization.

18396224402724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204266 (or 102133 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 54.

The spelling of 18396224402724 in words is "eighteen trillion, three hundred ninety-six billion, two hundred twenty-four million, four hundred two thousand, seven hundred twenty-four".