20220022181 has 2 divisors, whose sum is σ = 20220022182. Its totient is φ = 20220022180.

The previous prime is 20220022169. The next prime is 20220022201. The reversal of 20220022181 is 18122002202.

It is a happy number.

It is an a-pointer prime, because the next prime (20220022201) can be obtained adding 20220022181 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20211171556 + 8850625 = 142166^2 + 2975^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20220022181 is a prime.

It is a super-2 number, since 2×20220022181² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20220028181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10110011090 + 10110011091.

It is an arithmetic number, because the mean of its divisors is an integer number (10110011091).

Almost surely, 2^20220022181 is an apocalyptic number.

It is an amenable number.

20220022181 is a deficient number, since it is larger than the sum of its proper divisors (1).

20220022181 is an equidigital number, since it uses as much as digits as its factorization.

20220022181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 20220022181 its reverse (18122002202), we get a palindrome (38342024383).

The spelling of 20220022181 in words is "twenty billion, two hundred twenty million, twenty-two thousand, one hundred eighty-one".