22021949140 has 12 divisors (see below), whose sum is σ = 46246093236. Its totient is φ = 8808779648.

The previous prime is 22021949129. The next prime is 22021949143. The reversal of 22021949140 is 4194912022.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2490209604 + 19531739536 = 49902^2 + 139756^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22021949096 and 22021949105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22021949143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 550548709 + ... + 550548748.

It is an arithmetic number, because the mean of its divisors is an integer number (3853841103).

Almost surely, 2^22021949140 is an apocalyptic number.

22021949140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22021949140 is an abundant number, since it is smaller than the sum of its proper divisors (24224144096).

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

22021949140 is a wasteful number, since it uses less digits than its factorization.

22021949140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101097466 (or 1101097464 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The spelling of 22021949140 in words is "twenty-two billion, twenty-one million, nine hundred forty-nine thousand, one hundred forty".