18142804 has 12 divisors (see below), whose sum is σ = 32133024. Its totient is φ = 8961944.

The previous prime is 18142793. The next prime is 18142819. The reversal of 18142804 is 40824181.

It is a super-2 number, since 2×18142804² = 658322673964832, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 26992 + ... + 27655.

It is an arithmetic number, because the mean of its divisors is an integer number (2677752).

Almost surely, 2^18142804 is an apocalyptic number.

It is an amenable number.

18142804 is a deficient number, since it is larger than the sum of its proper divisors (13990220).

18142804 is a wasteful number, since it uses less digits than its factorization.

18142804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54734 (or 54732 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 28.

The square root of 18142804 is about 4259.4370520058. The cubic root of 18142804 is about 262.7653745617.

Adding to 18142804 its reverse (40824181), we get a palindrome (58966985).

The spelling of 18142804 in words is "eighteen million, one hundred forty-two thousand, eight hundred four".