18986043 has 8 divisors (see below), whose sum is σ = 26131456. Its totient is φ = 12249000.

The previous prime is 18986029. The next prime is 18986047. The reversal of 18986043 is 34068981.

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

It is not a de Polignac number, because 18986043 - 2⁹ = 18985531 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18985992 and 18986010.

It is not an unprimeable number, because it can be changed into a prime (18986047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101983 + ... + 102168.

It is an arithmetic number, because the mean of its divisors is an integer number (3266432).

Almost surely, 2^18986043 is an apocalyptic number.

18986043 is a deficient number, since it is larger than the sum of its proper divisors (7145413).

18986043 is a wasteful number, since it uses less digits than its factorization.

18986043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204185.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 18986043 is about 4357.2976717227. The cubic root of 18986043 is about 266.7748104778.

The spelling of 18986043 in words is "eighteen million, nine hundred eighty-six thousand, forty-three".