18700723 has 2 divisors, whose sum is σ = 18700724. Its totient is φ = 18700722.

The previous prime is 18700691. The next prime is 18700733. The reversal of 18700723 is 32700781.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (32700781) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18700723 - 2⁵ = 18700691 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18700691 and 18700700.

It is not a weakly prime, because it can be changed into another prime (18700733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9350361 + 9350362.

It is an arithmetic number, because the mean of its divisors is an integer number (9350362).

Almost surely, 2^18700723 is an apocalyptic number.

18700723 is a deficient number, since it is larger than the sum of its proper divisors (1).

18700723 is an equidigital number, since it uses as much as digits as its factorization.

18700723 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 18700723 is about 4324.4332576651. The cubic root of 18700723 is about 265.4317064437.

The spelling of 18700723 in words is "eighteen million, seven hundred thousand, seven hundred twenty-three".