18098623 has 2 divisors, whose sum is σ = 18098624. Its totient is φ = 18098622.

The previous prime is 18098617. The next prime is 18098627. The reversal of 18098623 is 32689081.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18098623 is a prime.

It is a super-2 number, since 2×18098623² = 655120308992258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18098627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9049311 + 9049312.

It is an arithmetic number, because the mean of its divisors is an integer number (9049312).

Almost surely, 2^18098623 is an apocalyptic number.

18098623 is a deficient number, since it is larger than the sum of its proper divisors (1).

18098623 is an equidigital number, since it uses as much as digits as its factorization.

18098623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 18098623 is about 4254.2476420632. The cubic root of 18098623 is about 262.5519074976.

It can be divided in two parts, 18098 and 623, that added together give a triangular number (18721 = T₁₉₃).

The spelling of 18098623 in words is "eighteen million, ninety-eight thousand, six hundred twenty-three".