18142544 has 60 divisors (see below), whose sum is σ = 41581044. Its totient is φ = 7644672.

The previous prime is 18142513. The next prime is 18142567. The reversal of 18142544 is 44524181.

It can be written as a sum of positive squares in 2 ways, for example, as 4892944 + 13249600 = 2212^2 + 3640^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57074 + ... + 57390.

Almost surely, 2^18142544 is an apocalyptic number.

18142544 is a gapful number since it is divisible by the number (14) 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 18142544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20790522).

18142544 is an abundant number, since it is smaller than the sum of its proper divisors (23438500).

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

18142544 is a wasteful number, since it uses less digits than its factorization.

18142544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412 (or 399 counting only the distinct ones).

The product of its digits is 5120, while the sum is 29.

The square root of 18142544 is about 4259.4065314313. The cubic root of 18142544 is about 262.7641193474.

The spelling of 18142544 in words is "eighteen million, one hundred forty-two thousand, five hundred forty-four".