18670350169 has 2 divisors, whose sum is σ = 18670350170. Its totient is φ = 18670350168.

The previous prime is 18670350163. The next prime is 18670350173. The reversal of 18670350169 is 96105307681.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18191265625 + 479084544 = 134875^2 + 21888^2 .

It is a cyclic number.

It is not a de Polignac number, because 18670350169 - 2³ = 18670350161 is a prime.

It is a super-2 number, since 2×18670350169² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18670350161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9335175084 + 9335175085.

It is an arithmetic number, because the mean of its divisors is an integer number (9335175085).

Almost surely, 2^18670350169 is an apocalyptic number.

It is an amenable number.

18670350169 is a deficient number, since it is larger than the sum of its proper divisors (1).

18670350169 is an equidigital number, since it uses as much as digits as its factorization.

18670350169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 46.

The spelling of 18670350169 in words is "eighteen billion, six hundred seventy million, three hundred fifty thousand, one hundred sixty-nine".