18290512 has 20 divisors (see below), whose sum is σ = 36108180. Its totient is φ = 8972288.

The previous prime is 18290507. The next prime is 18290513. The reversal of 18290512 is 21509281.

It can be written as a sum of positive squares in 2 ways, for example, as 5645376 + 12645136 = 2376^2 + 3556^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18290513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9937 + ... + 11632.

It is an arithmetic number, because the mean of its divisors is an integer number (1805409).

Almost surely, 2^18290512 is an apocalyptic number.

It is an amenable number.

18290512 is a deficient number, since it is larger than the sum of its proper divisors (17817668).

18290512 is a wasteful number, since it uses less digits than its factorization.

18290512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21630 (or 21624 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 18290512 is about 4276.7408151535. The cubic root of 18290512 is about 263.4765415927.

Adding to 18290512 its reverse (21509281), we get a palindrome (39799793).

The spelling of 18290512 in words is "eighteen million, two hundred ninety thousand, five hundred twelve".