18474443 has 8 divisors (see below), whose sum is σ = 19962768. Its totient is φ = 16995744.

The previous prime is 18474439. The next prime is 18474457. The reversal of 18474443 is 34447481.

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 18474443 - 2² = 18474439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18474143) 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, 1880 + ... + 6362.

It is an arithmetic number, because the mean of its divisors is an integer number (2495346).

Almost surely, 2^18474443 is an apocalyptic number.

18474443 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18474443 is a deficient number, since it is larger than the sum of its proper divisors (1488325).

18474443 is a wasteful number, since it uses less digits than its factorization.

18474443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4813.

The product of its digits is 43008, while the sum is 35.

The square root of 18474443 is about 4298.1906658500. The cubic root of 18474443 is about 264.3567786774.

The spelling of 18474443 in words is "eighteen million, four hundred seventy-four thousand, four hundred forty-three".