18869723 has 2 divisors, whose sum is σ = 18869724. Its totient is φ = 18869722.

The previous prime is 18869713. The next prime is 18869737. The reversal of 18869723 is 32796881.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18869723 - 2⁸ = 18869467 is a prime.

It is not a weakly prime, because it can be changed into another prime (18869713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9434861 + 9434862.

It is an arithmetic number, because the mean of its divisors is an integer number (9434862).

Almost surely, 2^18869723 is an apocalyptic number.

18869723 is a deficient number, since it is larger than the sum of its proper divisors (1).

18869723 is an equidigital number, since it uses as much as digits as its factorization.

18869723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 44.

The square root of 18869723 is about 4343.9294423367. The cubic root of 18869723 is about 266.2288860390.

The spelling of 18869723 in words is "eighteen million, eight hundred sixty-nine thousand, seven hundred twenty-three".