18864043 has 8 divisors (see below), whose sum is σ = 21135600. Its totient is φ = 16685280.

The previous prime is 18864037. The next prime is 18864047. The reversal of 18864043 is 34046881.

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

It is a cyclic number.

It is not a de Polignac number, because 18864043 - 2²¹ = 16766891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18864047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22768 + ... + 23581.

It is an arithmetic number, because the mean of its divisors is an integer number (2641950).

Almost surely, 2^18864043 is an apocalyptic number.

18864043 is a deficient number, since it is larger than the sum of its proper divisors (2271557).

18864043 is a wasteful number, since it uses less digits than its factorization.

18864043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46397.

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 18864043 is about 4343.2756071887. The cubic root of 18864043 is about 266.2021707232.

It can be divided in two parts, 1886 and 4043, that added together give a square (5929 = 77²).

The spelling of 18864043 in words is "eighteen million, eight hundred sixty-four thousand, forty-three".