18290513 has 2 divisors, whose sum is σ = 18290514. Its totient is φ = 18290512.

The previous prime is 18290507. The next prime is 18290533. The reversal of 18290513 is 31509281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17909824 + 380689 = 4232^2 + 617^2 .

It is a cyclic number.

It is not a de Polignac number, because 18290513 - 2⁶ = 18290449 is a prime.

It is not a weakly prime, because it can be changed into another prime (18290533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9145256 + 9145257.

It is an arithmetic number, because the mean of its divisors is an integer number (9145257).

Almost surely, 2^18290513 is an apocalyptic number.

It is an amenable number.

18290513 is a deficient number, since it is larger than the sum of its proper divisors (1).

18290513 is an equidigital number, since it uses as much as digits as its factorization.

18290513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 18290513 is about 4276.7409320650. The cubic root of 18290513 is about 263.4765463944.

Adding to 18290513 its reverse (31509281), we get a palindrome (49799794).

The spelling of 18290513 in words is "eighteen million, two hundred ninety thousand, five hundred thirteen".