22195820 has 12 divisors (see below), whose sum is σ = 46611264. Its totient is φ = 8878320.

The previous prime is 22195753. The next prime is 22195837. The reversal of 22195820 is 2859122.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 554876 + ... + 554915.

It is an arithmetic number, because the mean of its divisors is an integer number (3884272).

Almost surely, 2^22195820 is an apocalyptic number.

22195820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22195820 is an abundant number, since it is smaller than the sum of its proper divisors (24415444).

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

22195820 is a wasteful number, since it uses less digits than its factorization.

22195820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1109800 (or 1109798 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 22195820 is about 4711.2439970776. The cubic root of 22195820 is about 281.0328351595.

The spelling of 22195820 in words is "twenty-two million, one hundred ninety-five thousand, eight hundred twenty".