18320426940999 has 4 divisors (see below), whose sum is σ = 24427235921336. Its totient is φ = 12213617960664.

The previous prime is 18320426940989. The next prime is 18320426941001. The reversal of 18320426940999 is 99904962402381.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 18320426940999 - 2⁸ = 18320426940743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18320426940989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3053404490164 + ... + 3053404490169.

It is an arithmetic number, because the mean of its divisors is an integer number (6106808980334).

Almost surely, 2^{18320426940999} is an apocalyptic number.

18320426940999 is a deficient number, since it is larger than the sum of its proper divisors (6106808980337).

18320426940999 is an equidigital number, since it uses as much as digits as its factorization.

18320426940999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6106808980336.

The product of its (nonzero) digits is 60466176, while the sum is 66.

The spelling of 18320426940999 in words is "eighteen trillion, three hundred twenty billion, four hundred twenty-six million, nine hundred forty thousand, nine hundred ninety-nine".