18539484253 has 2 divisors, whose sum is σ = 18539484254. Its totient is φ = 18539484252.

The previous prime is 18539484241. The next prime is 18539484319. The reversal of 18539484253 is 35248493581.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9270223524 + 9269260729 = 96282^2 + 96277^2 .

It is a cyclic number.

It is not a de Polignac number, because 18539484253 - 2²⁵ = 18505929821 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18539484253.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18539434253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9269742126 + 9269742127.

It is an arithmetic number, because the mean of its divisors is an integer number (9269742127).

Almost surely, 2^18539484253 is an apocalyptic number.

It is an amenable number.

18539484253 is a deficient number, since it is larger than the sum of its proper divisors (1).

18539484253 is an equidigital number, since it uses as much as digits as its factorization.

18539484253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4147200, while the sum is 52.

The spelling of 18539484253 in words is "eighteen billion, five hundred thirty-nine million, four hundred eighty-four thousand, two hundred fifty-three".