18676769 has 2 divisors, whose sum is σ = 18676770. Its totient is φ = 18676768.

The previous prime is 18676733. The next prime is 18676789. The reversal of 18676769 is 96767681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10336225 + 8340544 = 3215^2 + 2888^2 .

It is an emirp because it is prime and its reverse (96767681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18676769 - 2⁸ = 18676513 is a prime.

It is a super-2 number, since 2×18676769² = 697643400558722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18676709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9338384 + 9338385.

It is an arithmetic number, because the mean of its divisors is an integer number (9338385).

Almost surely, 2^18676769 is an apocalyptic number.

It is an amenable number.

18676769 is a deficient number, since it is larger than the sum of its proper divisors (1).

18676769 is an equidigital number, since it uses as much as digits as its factorization.

18676769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 762048, while the sum is 50.

The square root of 18676769 is about 4321.6627587076. The cubic root of 18676769 is about 265.3183263750.

The spelling of 18676769 in words is "eighteen million, six hundred seventy-six thousand, seven hundred sixty-nine".