16638023 has 2 divisors, whose sum is σ = 16638024. Its totient is φ = 16638022.

The previous prime is 16638001. The next prime is 16638077. The reversal of 16638023 is 32083661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16638023 - 2⁸ = 16637767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16638823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8319011 + 8319012.

It is an arithmetic number, because the mean of its divisors is an integer number (8319012).

Almost surely, 2^16638023 is an apocalyptic number.

16638023 is a deficient number, since it is larger than the sum of its proper divisors (1).

16638023 is an equidigital number, since it uses as much as digits as its factorization.

16638023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 16638023 is about 4078.9732776766. The cubic root of 16638023 is about 255.2900608080.

The spelling of 16638023 in words is "sixteen million, six hundred thirty-eight thousand, twenty-three".