18474155213 has 2 divisors, whose sum is σ = 18474155214. Its totient is φ = 18474155212.

The previous prime is 18474155207. The next prime is 18474155239. The reversal of 18474155213 is 31255147481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10211708809 + 8262446404 = 101053^2 + 90898^2 .

It is a cyclic number.

It is not a de Polignac number, because 18474155213 - 2¹⁴ = 18474138829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18474145213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9237077606 + 9237077607.

It is an arithmetic number, because the mean of its divisors is an integer number (9237077607).

Almost surely, 2^18474155213 is an apocalyptic number.

It is an amenable number.

18474155213 is a deficient number, since it is larger than the sum of its proper divisors (1).

18474155213 is an equidigital number, since it uses as much as digits as its factorization.

18474155213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 134400, while the sum is 41.

The spelling of 18474155213 in words is "eighteen billion, four hundred seventy-four million, one hundred fifty-five thousand, two hundred thirteen".