16220420 has 48 divisors (see below), whose sum is σ = 35392896. Its totient is φ = 6240000.

The previous prime is 16220419. The next prime is 16220423. The reversal of 16220420 is 2402261.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (16220423) 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, 107345 + ... + 107495.

It is an arithmetic number, because the mean of its divisors is an integer number (737352).

Almost surely, 2^16220420 is an apocalyptic number.

16220420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16220420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17696448).

16220420 is an abundant number, since it is smaller than the sum of its proper divisors (19172476).

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

16220420 is a wasteful number, since it uses less digits than its factorization.

16220420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332 (or 330 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 16220420 is about 4027.4582555254. The cubic root of 16220420 is about 253.1360691192.

Adding to 16220420 its reverse (2402261), we get a palindrome (18622681).

The spelling of 16220420 in words is "sixteen million, two hundred twenty thousand, four hundred twenty".