18290533 has 2 divisors, whose sum is σ = 18290534. Its totient is φ = 18290532.

The previous prime is 18290513. The next prime is 18290537. The reversal of 18290533 is 33509281.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12687844 + 5602689 = 3562^2 + 2367^2 .

It is a cyclic number.

It is not a de Polignac number, because 18290533 - 2⁹ = 18290021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18290495 and 18290504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18290537) 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, 9145266 + 9145267.

It is an arithmetic number, because the mean of its divisors is an integer number (9145267).

Almost surely, 2^18290533 is an apocalyptic number.

It is an amenable number.

18290533 is a deficient number, since it is larger than the sum of its proper divisors (1).

18290533 is an equidigital number, since it uses as much as digits as its factorization.

18290533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 18290533 is about 4276.7432702934. The cubic root of 18290533 is about 263.4766424283.

The spelling of 18290533 in words is "eighteen million, two hundred ninety thousand, five hundred thirty-three".