18869936 has 40 divisors (see below), whose sum is σ = 38997504. Its totient is φ = 8824640.

The previous prime is 18869933. The next prime is 18869953. The reversal of 18869936 is 63996881.

It is not an unprimeable number, because it can be changed into a prime (18869933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16751 + ... + 17841.

Almost surely, 2^18869936 is an apocalyptic number.

18869936 is a gapful number since it is divisible by the number (16) 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 18869936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19498752).

18869936 is an abundant number, since it is smaller than the sum of its proper divisors (20127568).

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

18869936 is a wasteful number, since it uses less digits than its factorization.

18869936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1169 (or 1163 counting only the distinct ones).

The product of its digits is 559872, while the sum is 50.

The square root of 18869936 is about 4343.9539592404. The cubic root of 18869936 is about 266.2298877591.

The spelling of 18869936 in words is "eighteen million, eight hundred sixty-nine thousand, nine hundred thirty-six".