18191828223 has 24 divisors (see below), whose sum is σ = 26346867456. Its totient is φ = 12095730000.

The previous prime is 18191828191. The next prime is 18191828227. The reversal of 18191828223 is 32282819181.

It is not a de Polignac number, because 18191828223 - 2⁵ = 18191828191 is a prime.

It is a super-2 number, since 2×18191828223² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18191828227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7372836 + ... + 7375302.

It is an arithmetic number, because the mean of its divisors is an integer number (1097786144).

Almost surely, 2^18191828223 is an apocalyptic number.

18191828223 is a deficient number, since it is larger than the sum of its proper divisors (8155039233).

18191828223 is a wasteful number, since it uses less digits than its factorization.

18191828223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4315 (or 4312 counting only the distinct ones).

The product of its digits is 110592, while the sum is 45.

The spelling of 18191828223 in words is "eighteen billion, one hundred ninety-one million, eight hundred twenty-eight thousand, two hundred twenty-three".