20221272184 has 32 divisors (see below), whose sum is σ = 38201688720. Its totient is φ = 10034309376.

The previous prime is 20221272109. The next prime is 20221272187. The reversal of 20221272184 is 48127212202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20221272187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1099932 + ... + 1118164.

Almost surely, 2^20221272184 is an apocalyptic number.

It is an amenable number.

20221272184 is a deficient number, since it is larger than the sum of its proper divisors (17980416536).

20221272184 is a wasteful number, since it uses less digits than its factorization.

20221272184 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19279 (or 19275 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 31.

Adding to 20221272184 its reverse (48127212202), we get a palindrome (68348484386).

The spelling of 20221272184 in words is "twenty billion, two hundred twenty-one million, two hundred seventy-two thousand, one hundred eighty-four".