18222743 has 8 divisors (see below), whose sum is σ = 22719360. Its totient is φ = 14199480.

The previous prime is 18222731. The next prime is 18222749. The reversal of 18222743 is 34722281.

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 18222743 - 2⁶ = 18222679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18222749) 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, 118253 + ... + 118406.

It is an arithmetic number, because the mean of its divisors is an integer number (2839920).

Almost surely, 2^18222743 is an apocalyptic number.

18222743 is a deficient number, since it is larger than the sum of its proper divisors (4496617).

18222743 is a wasteful number, since it uses less digits than its factorization.

18222743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236677.

The product of its digits is 5376, while the sum is 29.

The square root of 18222743 is about 4268.8104900546. The cubic root of 18222743 is about 263.1507326030.

The spelling of 18222743 in words is "eighteen million, two hundred twenty-two thousand, seven hundred forty-three".