18229736 has 32 divisors (see below), whose sum is σ = 40327680. Its totient is φ = 7560000.

The previous prime is 18229727. The next prime is 18229751. The reversal of 18229736 is 63792281.

It is a self number, because there is not a number n which added to its sum of digits gives 18229736.

It is an unprimeable number.

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, 3515 + ... + 6986.

It is an arithmetic number, because the mean of its divisors is an integer number (1260240).

Almost surely, 2^18229736 is an apocalyptic number.

It is an amenable number.

18229736 is an abundant number, since it is smaller than the sum of its proper divisors (22097944).

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

18229736 is a wasteful number, since it uses less digits than its factorization.

18229736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10545 (or 10541 counting only the distinct ones).

The product of its digits is 36288, while the sum is 38.

The square root of 18229736 is about 4269.6294921222. The cubic root of 18229736 is about 263.1843897703.

The spelling of 18229736 in words is "eighteen million, two hundred twenty-nine thousand, seven hundred thirty-six".