18683106857 has 2 divisors, whose sum is σ = 18683106858. Its totient is φ = 18683106856.

The previous prime is 18683106773. The next prime is 18683106881. The reversal of 18683106857 is 75860138681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16287885376 + 2395221481 = 127624^2 + 48941^2 .

It is a cyclic number.

It is not a de Polignac number, because 18683106857 - 2⁸ = 18683106601 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18683106799 and 18683106808.

It is not a weakly prime, because it can be changed into another prime (18683106887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9341553428 + 9341553429.

It is an arithmetic number, because the mean of its divisors is an integer number (9341553429).

Almost surely, 2^18683106857 is an apocalyptic number.

It is an amenable number.

18683106857 is a deficient number, since it is larger than the sum of its proper divisors (1).

18683106857 is an equidigital number, since it uses as much as digits as its factorization.

18683106857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1935360, while the sum is 53.

The spelling of 18683106857 in words is "eighteen billion, six hundred eighty-three million, one hundred six thousand, eight hundred fifty-seven".