18142836 has 48 divisors (see below), whose sum is σ = 43512000. Its totient is φ = 5882112.

The previous prime is 18142823. The next prime is 18142867. The reversal of 18142836 is 63824181.

It is a junction number, because it is equal to n+sod(n) for n = 18142797 and 18142806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121690 + ... + 121838.

It is an arithmetic number, because the mean of its divisors is an integer number (906500).

Almost surely, 2^18142836 is an apocalyptic number.

It is an amenable number.

18142836 is an abundant number, since it is smaller than the sum of its proper divisors (25369164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18142836 is a wasteful number, since it uses less digits than its factorization.

18142836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368 (or 366 counting only the distinct ones).

The product of its digits is 9216, while the sum is 33.

The square root of 18142836 is about 4259.4408083691. The cubic root of 18142836 is about 262.7655290488.

The spelling of 18142836 in words is "eighteen million, one hundred forty-two thousand, eight hundred thirty-six".