18272820091123 has 16 divisors (see below), whose sum is σ = 20718505896480. Its totient is φ = 15976092996864.

The previous prime is 18272820091111. The next prime is 18272820091157. The reversal of 18272820091123 is 32119002827281.

It is not a de Polignac number, because 18272820091123 - 2²⁵ = 18272786536691 is a prime.

It is a super-2 number, since 2×18272820091123² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18272820092123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6646186 + ... + 8984287.

It is an arithmetic number, because the mean of its divisors is an integer number (1294906618530).

Almost surely, 2^{18272820091123} is an apocalyptic number.

18272820091123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18272820091123 is a deficient number, since it is larger than the sum of its proper divisors (2445685805357).

18272820091123 is a wasteful number, since it uses less digits than its factorization.

18272820091123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15635238.

The product of its (nonzero) digits is 193536, while the sum is 46.

The spelling of 18272820091123 in words is "eighteen trillion, two hundred seventy-two billion, eight hundred twenty million, ninety-one thousand, one hundred twenty-three".