18350663 has 2 divisors, whose sum is σ = 18350664. Its totient is φ = 18350662.

The previous prime is 18350653. The next prime is 18350669. The reversal of 18350663 is 36605381.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18350663 - 2¹⁸ = 18088519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18350669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9175331 + 9175332.

It is an arithmetic number, because the mean of its divisors is an integer number (9175332).

Almost surely, 2^18350663 is an apocalyptic number.

18350663 is a deficient number, since it is larger than the sum of its proper divisors (1).

18350663 is an equidigital number, since it uses as much as digits as its factorization.

18350663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 18350663 is about 4283.7673839741. The cubic root of 18350663 is about 263.7650524865.

The spelling of 18350663 in words is "eighteen million, three hundred fifty thousand, six hundred sixty-three".