18476018257 has 2 divisors, whose sum is σ = 18476018258. Its totient is φ = 18476018256.

The previous prime is 18476018203. The next prime is 18476018261. The reversal of 18476018257 is 75281067481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12797039376 + 5678978881 = 113124^2 + 75359^2 .

It is a cyclic number.

It is not a de Polignac number, because 18476018257 - 2¹⁹ = 18475493969 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18476018257.

It is not a weakly prime, because it can be changed into another prime (18476028257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9238009128 + 9238009129.

It is an arithmetic number, because the mean of its divisors is an integer number (9238009129).

Almost surely, 2^18476018257 is an apocalyptic number.

It is an amenable number.

18476018257 is a deficient number, since it is larger than the sum of its proper divisors (1).

18476018257 is an equidigital number, since it uses as much as digits as its factorization.

18476018257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 752640, while the sum is 49.

The spelling of 18476018257 in words is "eighteen billion, four hundred seventy-six million, eighteen thousand, two hundred fifty-seven".