18530933 has 2 divisors, whose sum is σ = 18530934. Its totient is φ = 18530932.

The previous prime is 18530903. The next prime is 18530959. The reversal of 18530933 is 33903581.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11444689 + 7086244 = 3383^2 + 2662^2 .

It is a cyclic number.

It is not a de Polignac number, because 18530933 - 2¹⁴ = 18514549 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18530933.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18530903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9265466 + 9265467.

It is an arithmetic number, because the mean of its divisors is an integer number (9265467).

Almost surely, 2^18530933 is an apocalyptic number.

It is an amenable number.

18530933 is a deficient number, since it is larger than the sum of its proper divisors (1).

18530933 is an equidigital number, since it uses as much as digits as its factorization.

18530933 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 18530933 is about 4304.7570198561. The cubic root of 18530933 is about 264.6259490715.

The spelling of 18530933 in words is "eighteen million, five hundred thirty thousand, nine hundred thirty-three".