18285244636 has 6 divisors (see below), whose sum is σ = 31999178120. Its totient is φ = 9142622316.

The previous prime is 18285244609. The next prime is 18285244639. The reversal of 18285244636 is 63644258281.

It is a self number, because there is not a number n which added to its sum of digits gives 18285244636.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18285244639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2285655576 + ... + 2285655583.

Almost surely, 2^18285244636 is an apocalyptic number.

It is an amenable number.

18285244636 is a deficient number, since it is larger than the sum of its proper divisors (13713933484).

18285244636 is a wasteful number, since it uses less digits than its factorization.

18285244636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4571311163 (or 4571311161 counting only the distinct ones).

The product of its digits is 2211840, while the sum is 49.

The spelling of 18285244636 in words is "eighteen billion, two hundred eighty-five million, two hundred forty-four thousand, six hundred thirty-six".