18227333169 has 12 divisors (see below), whose sum is σ = 26375645556. Its totient is φ = 12129736032.

The previous prime is 18227333077. The next prime is 18227333171. The reversal of 18227333169 is 96133372281.

It can be written as a sum of positive squares in 2 ways, for example, as 7104466944 + 11122866225 = 84288^2 + 105465^2 .

It is not a de Polignac number, because 18227333169 - 2⁷ = 18227333041 is a prime.

It is a super-2 number, since 2×18227333169² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (18227337169) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1812994 + ... + 1823019.

It is an arithmetic number, because the mean of its divisors is an integer number (2197970463).

Almost surely, 2^18227333169 is an apocalyptic number.

It is an amenable number.

18227333169 is a deficient number, since it is larger than the sum of its proper divisors (8148312387).

18227333169 is a wasteful number, since it uses less digits than its factorization.

18227333169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3636576 (or 3636573 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The spelling of 18227333169 in words is "eighteen billion, two hundred twenty-seven million, three hundred thirty-three thousand, one hundred sixty-nine".