22220221988 has 48 divisors (see below), whose sum is σ = 39938304000. Its totient is φ = 10813543200.

The previous prime is 22220221987. The next prime is 22220222009. The reversal of 22220221988 is 88912202222.

It is not an unprimeable number, because it can be changed into a prime (22220221987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13077563 + ... + 13079261.

It is an arithmetic number, because the mean of its divisors is an integer number (832048000).

Almost surely, 2^22220221988 is an apocalyptic number.

It is an amenable number.

22220221988 is a deficient number, since it is larger than the sum of its proper divisors (17718082012).

22220221988 is a wasteful number, since it uses less digits than its factorization.

22220221988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2280 (or 2278 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 38.

The spelling of 22220221988 in words is "twenty-two billion, two hundred twenty million, two hundred twenty-one thousand, nine hundred eighty-eight".