18023706 has 24 divisors (see below), whose sum is σ = 41349204. Its totient is φ = 5654400.

The previous prime is 18023693. The next prime is 18023729. The reversal of 18023706 is 60732081.

It can be written as a sum of positive squares in 2 ways, for example, as 17715681 + 308025 = 4209^2 + 555^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18023706.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29145 + ... + 29756.

Almost surely, 2^18023706 is an apocalyptic number.

18023706 is an abundant number, since it is smaller than the sum of its proper divisors (23325498).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18023706 is a wasteful number, since it uses less digits than its factorization.

18023706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58926 (or 58923 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 18023706 is about 4245.4335467653. The cubic root of 18023706 is about 262.1891394978.

Adding to 18023706 its reverse (60732081), we get a palindrome (78755787).

The spelling of 18023706 in words is "eighteen million, twenty-three thousand, seven hundred six".