18533325623873 has 2 divisors, whose sum is σ = 18533325623874. Its totient is φ = 18533325623872.

The previous prime is 18533325623867. The next prime is 18533325623909. The reversal of 18533325623873 is 37832652333581.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17338038226609 + 1195287397264 = 4163897^2 + 1093292^2 .

It is a cyclic number.

It is not a de Polignac number, because 18533325623873 - 2¹² = 18533325619777 is a prime.

It is not a weakly prime, because it can be changed into another prime (18533325623273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9266662811936 + 9266662811937.

It is an arithmetic number, because the mean of its divisors is an integer number (9266662811937).

Almost surely, 2^{18533325623873} is an apocalyptic number.

It is an amenable number.

18533325623873 is a deficient number, since it is larger than the sum of its proper divisors (1).

18533325623873 is an equidigital number, since it uses as much as digits as its factorization.

18533325623873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 65318400, while the sum is 59.

The spelling of 18533325623873 in words is "eighteen trillion, five hundred thirty-three billion, three hundred twenty-five million, six hundred twenty-three thousand, eight hundred seventy-three".