18090626 has 4 divisors (see below), whose sum is σ = 27135942. Its totient is φ = 9045312.

The previous prime is 18090623. The next prime is 18090637. The reversal of 18090626 is 62609081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 62609081 = 1097 ⋅57073.

It can be written as a sum of positive squares in only one way, i.e., 17648401 + 442225 = 4201^2 + 665^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18090592 and 18090601.

It is not an unprimeable number, because it can be changed into a prime (18090623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4522655 + ... + 4522658.

Almost surely, 2^18090626 is an apocalyptic number.

18090626 is a deficient number, since it is larger than the sum of its proper divisors (9045316).

18090626 is an equidigital number, since it uses as much as digits as its factorization.

18090626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9045315.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 18090626 is about 4253.3076540500. The cubic root of 18090626 is about 262.5132316837.

The spelling of 18090626 in words is "eighteen million, ninety thousand, six hundred twenty-six".