16220718 has 48 divisors (see below), whose sum is σ = 37889280. Its totient is φ = 4998672.

The previous prime is 16220713. The next prime is 16220759. The reversal of 16220718 is 81702261.

It is a super-2 number, since 2×16220718² = 526223384871048, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 16220691 and 16220700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16220713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14155 + ... + 15257.

It is an arithmetic number, because the mean of its divisors is an integer number (789360).

Almost surely, 2^16220718 is an apocalyptic number.

16220718 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 16220718, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18944640).

16220718 is an abundant number, since it is smaller than the sum of its proper divisors (21668562).

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

16220718 is a wasteful number, since it uses less digits than its factorization.

16220718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1173 (or 1170 counting only the distinct ones).

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

The square root of 16220718 is about 4027.4952513938. The cubic root of 16220718 is about 253.1376193069.

Adding to 16220718 its reverse (81702261), we get a palindrome (97922979).

The spelling of 16220718 in words is "sixteen million, two hundred twenty thousand, seven hundred eighteen".