18677723 has 2 divisors, whose sum is σ = 18677724. Its totient is φ = 18677722.

The previous prime is 18677719. The next prime is 18677777. The reversal of 18677723 is 32777681.

It is a weak prime.

It is an emirp because it is prime and its reverse (32777681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18677723 - 2² = 18677719 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (18677423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9338861 + 9338862.

It is an arithmetic number, because the mean of its divisors is an integer number (9338862).

Almost surely, 2^18677723 is an apocalyptic number.

18677723 is a deficient number, since it is larger than the sum of its proper divisors (1).

18677723 is an equidigital number, since it uses as much as digits as its factorization.

18677723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 98784, while the sum is 41.

The square root of 18677723 is about 4321.7731314820. The cubic root of 18677723 is about 265.3228437405.

The spelling of 18677723 in words is "eighteen million, six hundred seventy-seven thousand, seven hundred twenty-three".