16020220 has 12 divisors (see below), whose sum is σ = 33642504. Its totient is φ = 6408080.

The previous prime is 16020203. The next prime is 16020233. The reversal of 16020220 is 2202061.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 16020220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 400486 + ... + 400525.

It is an arithmetic number, because the mean of its divisors is an integer number (2803542).

Almost surely, 2^16020220 is an apocalyptic number.

16020220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16020220 is an abundant number, since it is smaller than the sum of its proper divisors (17622284).

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

16020220 is a wasteful number, since it uses less digits than its factorization.

16020220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801020 (or 801018 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 16020220 is about 4002.5267019721. The cubic root of 16020220 is about 252.0903136438.

Adding to 16020220 its reverse (2202061), we get a palindrome (18222281).

The spelling of 16020220 in words is "sixteen million, twenty thousand, two hundred twenty".