18344723 has 2 divisors, whose sum is σ = 18344724. Its totient is φ = 18344722.

The previous prime is 18344719. The next prime is 18344741. The reversal of 18344723 is 32744381.

It is a weak prime.

It is an emirp because it is prime and its reverse (32744381) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18344723 - 2² = 18344719 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18344723.

It is not a weakly prime, because it can be changed into another prime (18344773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9172361 + 9172362.

It is an arithmetic number, because the mean of its divisors is an integer number (9172362).

Almost surely, 2^18344723 is an apocalyptic number.

18344723 is a deficient number, since it is larger than the sum of its proper divisors (1).

18344723 is an equidigital number, since it uses as much as digits as its factorization.

18344723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 32.

The square root of 18344723 is about 4283.0740129024. The cubic root of 18344723 is about 263.7365896912.

The spelling of 18344723 in words is "eighteen million, three hundred forty-four thousand, seven hundred twenty-three".