18223621318051 has 4 divisors (see below), whose sum is σ = 18223828886232. Its totient is φ = 18223413749872.

The previous prime is 18223621318009. The next prime is 18223621318127. The reversal of 18223621318051 is 15081312632281.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18223621318051 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18223621317989 and 18223621318007.

It is not an unprimeable number, because it can be changed into a prime (18223621318151) 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 3 ways as a sum of consecutive naturals, for example, 103652341 + ... + 103828006.

It is an arithmetic number, because the mean of its divisors is an integer number (4555957221558).

Almost surely, 2^{18223621318051} is an apocalyptic number.

18223621318051 is a deficient number, since it is larger than the sum of its proper divisors (207568181).

18223621318051 is an equidigital number, since it uses as much as digits as its factorization.

18223621318051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207568180.

The product of its (nonzero) digits is 138240, while the sum is 43.

It can be divided in two parts, 1822362 and 1318051, that added together give a palindrome (3140413).

The spelling of 18223621318051 in words is "eighteen trillion, two hundred twenty-three billion, six hundred twenty-one million, three hundred eighteen thousand, fifty-one".