18086953 has 4 divisors (see below), whose sum is σ = 18099460. Its totient is φ = 18074448.

The previous prime is 18086941. The next prime is 18086983. The reversal of 18086953 is 35968081.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6615184 + 11471769 = 2572^2 + 3387^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18086953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18086933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3750 + ... + 7087.

It is an arithmetic number, because the mean of its divisors is an integer number (4524865).

Almost surely, 2^18086953 is an apocalyptic number.

It is an amenable number.

18086953 is a deficient number, since it is larger than the sum of its proper divisors (12507).

18086953 is a wasteful number, since it uses less digits than its factorization.

18086953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12506.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 18086953 is about 4252.8758505275. The cubic root of 18086953 is about 262.4954641695.

The spelling of 18086953 in words is "eighteen million, eighty-six thousand, nine hundred fifty-three".