18240023220193 has 2 divisors, whose sum is σ = 18240023220194. Its totient is φ = 18240023220192.

The previous prime is 18240023220187. The next prime is 18240023220241. The reversal of 18240023220193 is 39102232004281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14571756386209 + 3668266833984 = 3817297^2 + 1915272^2 .

It is a cyclic number.

It is not a de Polignac number, because 18240023220193 - 2²⁵ = 18239989665761 is a prime.

It is not a weakly prime, because it can be changed into another prime (18240023220593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9120011610096 + 9120011610097.

It is an arithmetic number, because the mean of its divisors is an integer number (9120011610097).

Almost surely, 2^{18240023220193} is an apocalyptic number.

It is an amenable number.

18240023220193 is a deficient number, since it is larger than the sum of its proper divisors (1).

18240023220193 is an equidigital number, since it uses as much as digits as its factorization.

18240023220193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 37.

The spelling of 18240023220193 in words is "eighteen trillion, two hundred forty billion, twenty-three million, two hundred twenty thousand, one hundred ninety-three".