18838316 has 24 divisors (see below), whose sum is σ = 37904160. Its totient is φ = 8024832.

The previous prime is 18838301. The next prime is 18838319. The reversal of 18838316 is 61383881.

It is a self number, because there is not a number n which added to its sum of digits gives 18838316.

It is not an unprimeable number, because it can be changed into a prime (18838319) 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, 2900 + ... + 6788.

It is an arithmetic number, because the mean of its divisors is an integer number (1579340).

Almost surely, 2^18838316 is an apocalyptic number.

It is an amenable number.

18838316 is an abundant number, since it is smaller than the sum of its proper divisors (19065844).

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

18838316 is a wasteful number, since it uses less digits than its factorization.

18838316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4073 (or 4071 counting only the distinct ones).

The product of its digits is 27648, while the sum is 38.

The square root of 18838316 is about 4340.3128919468. The cubic root of 18838316 is about 266.0810991339.

The spelling of 18838316 in words is "eighteen million, eight hundred thirty-eight thousand, three hundred sixteen".