18842436 has 24 divisors (see below), whose sum is σ = 48851040. Its totient is φ = 6280776.

The previous prime is 18842413. The next prime is 18842437. The reversal of 18842436 is 63424881.

18842436 is a `hidden beast` number, since 188 + 42 + 436 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 18842436.

It is not an unprimeable number, because it can be changed into a prime (18842437) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 87126 + ... + 87341.

It is an arithmetic number, because the mean of its divisors is an integer number (2035460).

Almost surely, 2^18842436 is an apocalyptic number.

It is an amenable number.

18842436 is an abundant number, since it is smaller than the sum of its proper divisors (30008604).

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

18842436 is a wasteful number, since it uses less digits than its factorization.

18842436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174480 (or 174472 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 18842436 is about 4340.7874861596. The cubic root of 18842436 is about 266.1004953160.

It can be divided in two parts, 188 and 42436, that added together give a palindrome (42624).

The spelling of 18842436 in words is "eighteen million, eight hundred forty-two thousand, four hundred thirty-six".