18413623 has 2 divisors, whose sum is σ = 18413624. Its totient is φ = 18413622.

The previous prime is 18413617. The next prime is 18413627. The reversal of 18413623 is 32631481.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18413623 - 2⁹ = 18413111 is a prime.

It is a super-2 number, since 2×18413623² = 678123023972258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18413591 and 18413600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18413627) 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, 9206811 + 9206812.

It is an arithmetic number, because the mean of its divisors is an integer number (9206812).

Almost surely, 2^18413623 is an apocalyptic number.

18413623 is a deficient number, since it is larger than the sum of its proper divisors (1).

18413623 is an equidigital number, since it uses as much as digits as its factorization.

18413623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 28.

The square root of 18413623 is about 4291.1097632198. The cubic root of 18413623 is about 264.0663620667.

The spelling of 18413623 in words is "eighteen million, four hundred thirteen thousand, six hundred twenty-three".