18964723 has 2 divisors, whose sum is σ = 18964724. Its totient is φ = 18964722.

The previous prime is 18964721. The next prime is 18964789. The reversal of 18964723 is 32746981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18964723 - 2¹ = 18964721 is a prime.

Together with 18964721, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (18964721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9482361 + 9482362.

It is an arithmetic number, because the mean of its divisors is an integer number (9482362).

Almost surely, 2^18964723 is an apocalyptic number.

18964723 is a deficient number, since it is larger than the sum of its proper divisors (1).

18964723 is an equidigital number, since it uses as much as digits as its factorization.

18964723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 40.

The square root of 18964723 is about 4354.8505140820. The cubic root of 18964723 is about 266.6749165850.

The spelling of 18964723 in words is "eighteen million, nine hundred sixty-four thousand, seven hundred twenty-three".