18442726416 has 45 divisors (see below), whose sum is σ = 51618580221. Its totient is φ = 6147032256.

The previous prime is 18442726343. The next prime is 18442726427. The reversal of 18442726416 is 61462724481.

The square root of 18442726416 is 135804.

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

18442726416 is a `hidden beast` number, since 184 + 427 + 2 + 6 + 41 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 17918499600 + 524226816 = 133860^2 + 22896^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1623990 + ... + 1635306.

Almost surely, 2^18442726416 is an apocalyptic number.

18442726416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

18442726416 is the 135804-th square number.

It is an amenable number.

18442726416 is an abundant number, since it is smaller than the sum of its proper divisors (33175853805).

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

18442726416 is an frugal number, since it uses more digits than its factorization.

18442726416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22648 (or 11322 counting only the distinct ones).

The product of its digits is 516096, while the sum is 45.

The spelling of 18442726416 in words is "eighteen billion, four hundred forty-two million, seven hundred twenty-six thousand, four hundred sixteen".