18223201238817 has 4 divisors (see below), whose sum is σ = 24297601651760. Its totient is φ = 12148800825876.

The previous prime is 18223201238789. The next prime is 18223201238819. The reversal of 18223201238817 is 71883210232281.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 18223201238817 - 2¹⁴ = 18223201222433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18223201238819) 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, 3037200206467 + ... + 3037200206472.

It is an arithmetic number, because the mean of its divisors is an integer number (6074400412940).

Almost surely, 2^{18223201238817} is an apocalyptic number.

It is an amenable number.

18223201238817 is a deficient number, since it is larger than the sum of its proper divisors (6074400412943).

18223201238817 is an equidigital number, since it uses as much as digits as its factorization.

18223201238817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6074400412942.

The product of its (nonzero) digits is 516096, while the sum is 48.

The spelling of 18223201238817 in words is "eighteen trillion, two hundred twenty-three billion, two hundred one million, two hundred thirty-eight thousand, eight hundred seventeen".