18255213461 has 2 divisors, whose sum is σ = 18255213462. Its totient is φ = 18255213460.

The previous prime is 18255213401. The next prime is 18255213467. The reversal of 18255213461 is 16431255281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16892200900 + 1363012561 = 129970^2 + 36919^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18255213461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18255213467) 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, 9127606730 + 9127606731.

It is an arithmetic number, because the mean of its divisors is an integer number (9127606731).

Almost surely, 2^18255213461 is an apocalyptic number.

It is an amenable number.

18255213461 is a deficient number, since it is larger than the sum of its proper divisors (1).

18255213461 is an equidigital number, since it uses as much as digits as its factorization.

18255213461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 57600, while the sum is 38.

The spelling of 18255213461 in words is "eighteen billion, two hundred fifty-five million, two hundred thirteen thousand, four hundred sixty-one".