20221089220 has 48 divisors (see below), whose sum is σ = 42949756080. Its totient is φ = 7996299264.

The previous prime is 20221089209. The next prime is 20221089221. The reversal of 20221089220 is 2298012202.

It can be written as a sum of positive squares in 8 ways, for example, as 993384324 + 19227704896 = 31518^2 + 138664^2 .

It is not an unprimeable number, because it can be changed into a prime (20221089221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 986112 + ... + 1006408.

It is an arithmetic number, because the mean of its divisors is an integer number (894786585).

Almost surely, 2^20221089220 is an apocalyptic number.

20221089220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20221089220 is an abundant number, since it is smaller than the sum of its proper divisors (22728666860).

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

20221089220 is a wasteful number, since it uses less digits than its factorization.

20221089220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20872 (or 20870 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The spelling of 20221089220 in words is "twenty billion, two hundred twenty-one million, eighty-nine thousand, two hundred twenty".