18142263 has 12 divisors (see below), whose sum is σ = 26438880. Its totient is φ = 11987136.

The previous prime is 18142253. The next prime is 18142273. The reversal of 18142263 is 36224181.

18142263 is a `hidden beast` number, since 181 + 422 + 63 = 666.

It is an interprime number because it is at equal distance from previous prime (18142253) and next prime (18142273).

It is not a de Polignac number, because 18142263 - 2⁵ = 18142231 is a prime.

It is a super-2 number, since 2×18142263² = 658283413522338, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18142253) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7903 + ... + 9936.

It is an arithmetic number, because the mean of its divisors is an integer number (2203240).

Almost surely, 2^18142263 is an apocalyptic number.

18142263 is a deficient number, since it is larger than the sum of its proper divisors (8296617).

18142263 is a wasteful number, since it uses less digits than its factorization.

18142263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17958 (or 17955 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 18142263 is about 4259.3735454876. The cubic root of 18142263 is about 262.7627627368.

The spelling of 18142263 in words is "eighteen million, one hundred forty-two thousand, two hundred sixty-three".