22020220 has 24 divisors (see below), whose sum is σ = 46935504. Its totient is φ = 8676096.

The previous prime is 22020211. The next prime is 22020227. The reversal of 22020220 is 2202022.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 22020197 and 22020206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22020227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6877 + ... + 9556.

It is an arithmetic number, because the mean of its divisors is an integer number (1955646).

Almost surely, 2^22020220 is an apocalyptic number.

22020220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22020220 is an abundant number, since it is smaller than the sum of its proper divisors (24915284).

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

22020220 is a wasteful number, since it uses less digits than its factorization.

22020220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16509 (or 16507 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 10.

The square root of 22020220 is about 4692.5707240275. The cubic root of 22020220 is about 280.2897510752.

22020220 divided by its sum of digits (10) gives a palindrome (2202022).

Adding to 22020220 its reverse (2202022), we get a palindrome (24222242).

The spelling of 22020220 in words is "twenty-two million, twenty thousand, two hundred twenty".