18142385 has 8 divisors (see below), whose sum is σ = 21974976. Its totient is φ = 14377840.

The previous prime is 18142381. The next prime is 18142391. The reversal of 18142385 is 58324181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18142385 - 2² = 18142381 is a prime.

It is a super-2 number, since 2×18142385² = 658292266976450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18142381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16421 + ... + 17490.

It is an arithmetic number, because the mean of its divisors is an integer number (2746872).

Almost surely, 2^18142385 is an apocalyptic number.

It is an amenable number.

18142385 is a deficient number, since it is larger than the sum of its proper divisors (3832591).

18142385 is a wasteful number, since it uses less digits than its factorization.

18142385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34023.

The product of its digits is 7680, while the sum is 32.

The square root of 18142385 is about 4259.3878668184. The cubic root of 18142385 is about 262.7633517296.

The spelling of 18142385 in words is "eighteen million, one hundred forty-two thousand, three hundred eighty-five".