18842516 has 48 divisors (see below), whose sum is σ = 41513472. Its totient is φ = 7269600.

The previous prime is 18842501. The next prime is 18842519. The reversal of 18842516 is 61524881.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18842519) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40115 + ... + 40581.

It is an arithmetic number, because the mean of its divisors is an integer number (864864).

Almost surely, 2^18842516 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18842516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20756736).

18842516 is an abundant number, since it is smaller than the sum of its proper divisors (22670956).

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

18842516 is a wasteful number, since it uses less digits than its factorization.

18842516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620 (or 618 counting only the distinct ones).

The product of its digits is 15360, while the sum is 35.

The square root of 18842516 is about 4340.7967010677. The cubic root of 18842516 is about 266.1008719129.

The spelling of 18842516 in words is "eighteen million, eight hundred forty-two thousand, five hundred sixteen".