18028523 has 2 divisors, whose sum is σ = 18028524. Its totient is φ = 18028522.

The previous prime is 18028519. The next prime is 18028529. The reversal of 18028523 is 32582081.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18028523 - 2² = 18028519 is a prime.

It is not a weakly prime, because it can be changed into another prime (18028529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9014261 + 9014262.

It is an arithmetic number, because the mean of its divisors is an integer number (9014262).

Almost surely, 2^18028523 is an apocalyptic number.

18028523 is a deficient number, since it is larger than the sum of its proper divisors (1).

18028523 is an equidigital number, since it uses as much as digits as its factorization.

18028523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 18028523 is about 4246.0008243051. Note that the first 3 decimals coincide. The cubic root of 18028523 is about 262.2124948978.

The spelling of 18028523 in words is "eighteen million, twenty-eight thousand, five hundred twenty-three".