18382709904481 has 8 divisors (see below), whose sum is σ = 20067953068520. Its totient is φ = 16736207962752.

The previous prime is 18382709904469. The next prime is 18382709904487. The reversal of 18382709904481 is 18440990728381.

It can be written as a sum of positive squares in 4 ways, for example, as 2677412238400 + 15705297666081 = 1636280^2 + 3962991^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18382709904481 - 2²⁷ = 18382575686753 is a prime.

It is a super-2 number, since 2×18382709904481² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18382709904487) 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 7 ways as a sum of consecutive naturals, for example, 9685304586 + ... + 9685306483.

It is an arithmetic number, because the mean of its divisors is an integer number (2508494133565).

Almost surely, 2^{18382709904481} is an apocalyptic number.

It is an amenable number.

18382709904481 is a deficient number, since it is larger than the sum of its proper divisors (1685243164039).

18382709904481 is a wasteful number, since it uses less digits than its factorization.

18382709904481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19370611155.

The product of its (nonzero) digits is 27869184, while the sum is 64.

The spelling of 18382709904481 in words is "eighteen trillion, three hundred eighty-two billion, seven hundred nine million, nine hundred four thousand, four hundred eighty-one".