18213568413 has 8 divisors (see below), whose sum is σ = 24312139968. Its totient is φ = 12128687904.

The previous prime is 18213568411. The next prime is 18213568433. The reversal of 18213568413 is 31486531281.

It is a happy number.

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

It is not a de Polignac number, because 18213568413 - 2¹ = 18213568411 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18213568411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3419656 + ... + 3424977.

It is an arithmetic number, because the mean of its divisors is an integer number (3039017496).

Almost surely, 2^18213568413 is an apocalyptic number.

It is an amenable number.

18213568413 is a deficient number, since it is larger than the sum of its proper divisors (6098571555).

18213568413 is an equidigital number, since it uses as much as digits as its factorization.

18213568413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6845523.

The product of its digits is 138240, while the sum is 42.

The spelling of 18213568413 in words is "eighteen billion, two hundred thirteen million, five hundred sixty-eight thousand, four hundred thirteen".