18106423 has 2 divisors, whose sum is σ = 18106424. Its totient is φ = 18106422.

The previous prime is 18106351. The next prime is 18106453. The reversal of 18106423 is 32460181.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18106423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18106453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9053211 + 9053212.

It is an arithmetic number, because the mean of its divisors is an integer number (9053212).

Almost surely, 2^18106423 is an apocalyptic number.

18106423 is a deficient number, since it is larger than the sum of its proper divisors (1).

18106423 is an equidigital number, since it uses as much as digits as its factorization.

18106423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 18106423 is about 4255.1642741497. The cubic root of 18106423 is about 262.5896195886.

The spelling of 18106423 in words is "eighteen million, one hundred six thousand, four hundred twenty-three".