18069243 has 4 divisors (see below), whose sum is σ = 24092328. Its totient is φ = 12046160.

The previous prime is 18069241. The next prime is 18069253. The reversal of 18069243 is 34296081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34296081 = 3 ⋅11432027.

It is a cyclic number.

It is not a de Polignac number, because 18069243 - 2¹ = 18069241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18069241) 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, 3011538 + ... + 3011543.

It is an arithmetic number, because the mean of its divisors is an integer number (6023082).

Almost surely, 2^18069243 is an apocalyptic number.

18069243 is a deficient number, since it is larger than the sum of its proper divisors (6023085).

18069243 is an equidigital number, since it uses as much as digits as its factorization.

18069243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6023084.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 18069243 is about 4250.7932200943. The cubic root of 18069243 is about 262.4097612727.

The spelling of 18069243 in words is "eighteen million, sixty-nine thousand, two hundred forty-three".