18242436 has 12 divisors (see below), whose sum is σ = 42565712. Its totient is φ = 6080808.

The previous prime is 18242431. The next prime is 18242437. The reversal of 18242436 is 63424281.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (18242431) 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 3 ways as a sum of consecutive naturals, for example, 760090 + ... + 760113.

Almost surely, 2^18242436 is an apocalyptic number.

It is an amenable number.

18242436 is an abundant number, since it is smaller than the sum of its proper divisors (24323276).

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

18242436 is a wasteful number, since it uses less digits than its factorization.

18242436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1520210 (or 1520208 counting only the distinct ones).

The product of its digits is 9216, while the sum is 30.

The square root of 18242436 is about 4271.1164816708. The cubic root of 18242436 is about 263.2454926091.

The spelling of 18242436 in words is "eighteen million, two hundred forty-two thousand, four hundred thirty-six".