18142336 has 32 divisors (see below), whose sum is σ = 37035180. Its totient is φ = 8847360.

The previous prime is 18142309. The next prime is 18142343. The reversal of 18142336 is 63324181.

It can be written as a sum of positive squares in 2 ways, for example, as 12110400 + 6031936 = 3480^2 + 2456^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3520 + ... + 6976.

Almost surely, 2^18142336 is an apocalyptic number.

18142336 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18142336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18517590).

18142336 is an abundant number, since it is smaller than the sum of its proper divisors (18892844).

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

18142336 is an equidigital number, since it uses as much as digits as its factorization.

18142336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3512 (or 3500 counting only the distinct ones).

The product of its digits is 3456, while the sum is 28.

The square root of 18142336 is about 4259.3821148143. The cubic root of 18142336 is about 262.7631151673.

The spelling of 18142336 in words is "eighteen million, one hundred forty-two thousand, three hundred thirty-six".