22002220 has 24 divisors (see below), whose sum is σ = 46305504. Its totient is φ = 8781696.

The previous prime is 22002217. The next prime is 22002257. The reversal of 22002220 is 2220022.

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 = 22002197 and 22002206.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11449 + ... + 13231.

It is an arithmetic number, because the mean of its divisors is an integer number (1929396).

Almost surely, 2^22002220 is an apocalyptic number.

22002220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22002220 is an abundant number, since it is smaller than the sum of its proper divisors (24303284).

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

22002220 is a wasteful number, since it uses less digits than its factorization.

22002220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2409 (or 2407 counting only the distinct ones).

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

The square root of 22002220 is about 4690.6524066488. The cubic root of 22002220 is about 280.2133577899.

Adding to 22002220 its reverse (2220022), we get a palindrome (24222242).

It can be divided in two parts, 22002 and 220, that added together give a palindrome (22222).

The spelling of 22002220 in words is "twenty-two million, two thousand, two hundred twenty".