18930623 has 2 divisors, whose sum is σ = 18930624. Its totient is φ = 18930622.

The previous prime is 18930581. The next prime is 18930641. The reversal of 18930623 is 32603981.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18930623 - 2¹⁴ = 18914239 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18930623.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18930683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9465311 + 9465312.

It is an arithmetic number, because the mean of its divisors is an integer number (9465312).

Almost surely, 2^18930623 is an apocalyptic number.

18930623 is a deficient number, since it is larger than the sum of its proper divisors (1).

18930623 is an equidigital number, since it uses as much as digits as its factorization.

18930623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 18930623 is about 4350.9335779807. The cubic root of 18930623 is about 266.5149868312.

The spelling of 18930623 in words is "eighteen million, nine hundred thirty thousand, six hundred twenty-three".