18142899 has 8 divisors (see below), whose sum is σ = 24317952. Its totient is φ = 12031560.

The previous prime is 18142879. The next prime is 18142919. The reversal of 18142899 is 99824181.

It is an interprime number because it is at equal distance from previous prime (18142879) and next prime (18142919).

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

It is not a de Polignac number, because 18142899 - 2⁵ = 18142867 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18142899.

It is not an unprimeable number, because it can be changed into a prime (18142819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15259 + ... + 16404.

It is an arithmetic number, because the mean of its divisors is an integer number (3039744).

Almost surely, 2^18142899 is an apocalyptic number.

18142899 is a deficient number, since it is larger than the sum of its proper divisors (6175053).

18142899 is a wasteful number, since it uses less digits than its factorization.

18142899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31857.

The product of its digits is 41472, while the sum is 42.

The square root of 18142899 is about 4259.4482036996. The cubic root of 18142899 is about 262.7658331947.

The spelling of 18142899 in words is "eighteen million, one hundred forty-two thousand, eight hundred ninety-nine".