18000623 has 2 divisors, whose sum is σ = 18000624. Its totient is φ = 18000622.

The previous prime is 18000613. The next prime is 18000629. The reversal of 18000623 is 32600081.

It is a strong prime.

It is an emirp because it is prime and its reverse (32600081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18000623 - 2¹² = 17996527 is a prime.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 18000595 and 18000604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18000629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9000311 + 9000312.

It is an arithmetic number, because the mean of its divisors is an integer number (9000312).

Almost surely, 2^18000623 is an apocalyptic number.

18000623 is a deficient number, since it is larger than the sum of its proper divisors (1).

18000623 is an equidigital number, since it uses as much as digits as its factorization.

18000623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 18000623 is about 4242.7141077381. The cubic root of 18000623 is about 262.0771629451.

The spelling of 18000623 in words is "eighteen million, six hundred twenty-three", and thus it is an aban number.