18306026 has 8 divisors (see below), whose sum is σ = 27557604. Its totient is φ = 9120160.

The previous prime is 18306017. The next prime is 18306037. The reversal of 18306026 is 62060381.

It can be written as a sum of positive squares in 2 ways, for example, as 17098225 + 1207801 = 4135^2 + 1099^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×18306026² = 670221175825352, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18305986 and 18306004.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15725 + ... + 16848.

Almost surely, 2^18306026 is an apocalyptic number.

18306026 is a deficient number, since it is larger than the sum of its proper divisors (9251578).

18306026 is a wasteful number, since it uses less digits than its factorization.

18306026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32856.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 18306026 is about 4278.5541950523. The cubic root of 18306026 is about 263.5510140828.

The spelling of 18306026 in words is "eighteen million, three hundred six thousand, twenty-six".