18069443 has 4 divisors (see below), whose sum is σ = 20650800. Its totient is φ = 15488088.

The previous prime is 18069371. The next prime is 18069473. The reversal of 18069443 is 34496081.

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

It is not a de Polignac number, because 18069443 - 2¹⁰ = 18068419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18069473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1290668 + ... + 1290681.

It is an arithmetic number, because the mean of its divisors is an integer number (5162700).

Almost surely, 2^18069443 is an apocalyptic number.

18069443 is a deficient number, since it is larger than the sum of its proper divisors (2581357).

18069443 is an equidigital number, since it uses as much as digits as its factorization.

18069443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2581356.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 18069443 is about 4250.8167450503. The cubic root of 18069443 is about 262.4107294328.

The spelling of 18069443 in words is "eighteen million, sixty-nine thousand, four hundred forty-three".