22018726 has 8 divisors (see below), whose sum is σ = 33151680. Its totient is φ = 10968168.

The previous prime is 22018699. The next prime is 22018727. The reversal of 22018726 is 62781022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 22018694 and 22018703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22018727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19926 + ... + 21001.

It is an arithmetic number, because the mean of its divisors is an integer number (4143960).

Almost surely, 2^22018726 is an apocalyptic number.

22018726 is a deficient number, since it is larger than the sum of its proper divisors (11132954).

22018726 is a wasteful number, since it uses less digits than its factorization.

22018726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41198.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 22018726 is about 4692.4115335294. The cubic root of 22018726 is about 280.2834120172.

Adding to 22018726 its reverse (62781022), we get a palindrome (84799748).

The spelling of 22018726 in words is "twenty-two million, eighteen thousand, seven hundred twenty-six".