22221020020 has 24 divisors (see below), whose sum is σ = 47656998144. Its totient is φ = 8699292576.

The previous prime is 22221019993. The next prime is 22221020027. The reversal of 22221020020 is 2002012222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221020027) 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, 11818752 + ... + 11820631.

It is an arithmetic number, because the mean of its divisors is an integer number (1985708256).

Almost surely, 2^22221020020 is an apocalyptic number.

22221020020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22221020020 is an abundant number, since it is smaller than the sum of its proper divisors (25435978124).

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

22221020020 is a wasteful number, since it uses less digits than its factorization.

22221020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23639439 (or 23639437 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

Adding to 22221020020 its reverse (2002012222), we get a palindrome (24223032242).

The spelling of 22221020020 in words is "twenty-two billion, two hundred twenty-one million, twenty thousand, twenty".