18326953 has 4 divisors (see below), whose sum is σ = 18340308. Its totient is φ = 18313600.

The previous prime is 18326911. The next prime is 18326977. The reversal of 18326953 is 35962381.

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 5345344 + 12981609 = 2312^2 + 3603^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18326953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18336953) 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, 4348 + ... + 7453.

It is an arithmetic number, because the mean of its divisors is an integer number (4585077).

Almost surely, 2^18326953 is an apocalyptic number.

It is an amenable number.

18326953 is a deficient number, since it is larger than the sum of its proper divisors (13355).

18326953 is a wasteful number, since it uses less digits than its factorization.

18326953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13354.

The product of its digits is 38880, while the sum is 37.

The square root of 18326953 is about 4280.9990656388. Note that the first 3 decimals coincide. The cubic root of 18326953 is about 263.6514041900.

The spelling of 18326953 in words is "eighteen million, three hundred twenty-six thousand, nine hundred fifty-three".