18366043 has 4 divisors (see below), whose sum is σ = 18958528. Its totient is φ = 17773560.

The previous prime is 18366011. The next prime is 18366059. The reversal of 18366043 is 34066381.

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

It is a cyclic number.

It is not a de Polignac number, because 18366043 - 2⁵ = 18366011 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 592453 = 18366043 / (1 + 8 + 3 + 6 + 6 + 0 + 4 + 3).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18365996 and 18366014.

It is not an unprimeable number, because it can be changed into a prime (18366743) 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, 296196 + ... + 296257.

It is an arithmetic number, because the mean of its divisors is an integer number (4739632).

Almost surely, 2^18366043 is an apocalyptic number.

18366043 is a deficient number, since it is larger than the sum of its proper divisors (592485).

18366043 is an equidigital number, since it uses as much as digits as its factorization.

18366043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592484.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 18366043 is about 4285.5621568238. The cubic root of 18366043 is about 263.8387205552.

The spelling of 18366043 in words is "eighteen million, three hundred sixty-six thousand, forty-three".