20220021189 has 12 divisors (see below), whose sum is σ = 29216573100. Its totient is φ = 13475456064.

The previous prime is 20220021167. The next prime is 20220021271. The reversal of 20220021189 is 98112002202.

It can be written as a sum of positive squares in 2 ways, for example, as 435348225 + 19784672964 = 20865^2 + 140658^2 .

It is not a de Polignac number, because 20220021189 - 2⁷ = 20220021061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20220021139) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 351634 + ... + 405075.

It is an arithmetic number, because the mean of its divisors is an integer number (2434714425).

Almost surely, 2^20220021189 is an apocalyptic number.

It is an amenable number.

20220021189 is a deficient number, since it is larger than the sum of its proper divisors (8996551911).

20220021189 is a wasteful number, since it uses less digits than its factorization.

20220021189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 759684 (or 759681 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The spelling of 20220021189 in words is "twenty billion, two hundred twenty million, twenty-one thousand, one hundred eighty-nine".