18882944393401 has 27 divisors (see below), whose sum is σ = 21251860817733. Its totient is φ = 16765271412120.

The previous prime is 18882944393393. The next prime is 18882944393441. The reversal of 18882944393401 is 10439344928881.

The square root of 18882944393401 is 4345451.

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

It is not a de Polignac number, because 18882944393401 - 2³ = 18882944393393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18882944393441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2055393730 + ... + 2055402916.

Almost surely, 2^{18882944393401} is an apocalyptic number.

18882944393401 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

18882944393401 is the 4345451-st square number.

18882944393401 is the 2172726-th centered octagonal number.

It is an amenable number.

18882944393401 is a deficient number, since it is larger than the sum of its proper divisors (2368916424332).

18882944393401 is an frugal number, since it uses more digits than its factorization.

18882944393401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18482 (or 9241 counting only the distinct ones).

The product of its (nonzero) digits is 47775744, while the sum is 64.

The spelling of 18882944393401 in words is "eighteen trillion, eight hundred eighty-two billion, nine hundred forty-four million, three hundred ninety-three thousand, four hundred one".