18634336 has 48 divisors (see below), whose sum is σ = 42971040. Its totient is φ = 7787520.

The previous prime is 18634333. The next prime is 18634337. The reversal of 18634336 is 63343681.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18634331) 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, 8170 + ... + 10198.

It is an arithmetic number, because the mean of its divisors is an integer number (895230).

Almost surely, 2^18634336 is an apocalyptic number.

18634336 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 18634336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21485520).

18634336 is an abundant number, since it is smaller than the sum of its proper divisors (24336704).

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

18634336 is a wasteful number, since it uses less digits than its factorization.

18634336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2087 (or 2079 counting only the distinct ones).

The product of its digits is 31104, while the sum is 34.

The square root of 18634336 is about 4316.7506298141. The cubic root of 18634336 is about 265.1172425322.

The spelling of 18634336 in words is "eighteen million, six hundred thirty-four thousand, three hundred thirty-six".