22042220 has 12 divisors (see below), whose sum is σ = 46288704. Its totient is φ = 8816880.

The previous prime is 22042219. The next prime is 22042231. The reversal of 22042220 is 2224022.

It is a hoax number, since the sum of its digits (14) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 22042195 and 22042204.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 551036 + ... + 551075.

It is an arithmetic number, because the mean of its divisors is an integer number (3857392).

Almost surely, 2^22042220 is an apocalyptic number.

22042220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22042220 is an abundant number, since it is smaller than the sum of its proper divisors (24246484).

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

22042220 is a wasteful number, since it uses less digits than its factorization.

22042220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1102120 (or 1102118 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 22042220 is about 4694.9142697178. The cubic root of 22042220 is about 280.3830641316.

Adding to 22042220 its reverse (2224022), we get a palindrome (24266242).

The spelling of 22042220 in words is "twenty-two million, forty-two thousand, two hundred twenty".