16018722 has 40 divisors (see below), whose sum is σ = 36504732. Its totient is φ = 5248800.

The previous prime is 16018721. The next prime is 16018733. The reversal of 16018722 is 22781061.

16018722 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 15610401 + 408321 = 3951^2 + 639^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (16018721) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9072 + ... + 10692.

Almost surely, 2^16018722 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16018722, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18252366).

16018722 is an abundant number, since it is smaller than the sum of its proper divisors (20486010).

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

16018722 is a wasteful number, since it uses less digits than its factorization.

16018722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1696 (or 1687 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 16018722 is about 4002.3395658040. The cubic root of 16018722 is about 252.0824560101.

Adding to 16018722 its reverse (22781061), we get a palindrome (38799783).

The spelling of 16018722 in words is "sixteen million, eighteen thousand, seven hundred twenty-two".