20022212173 has 2 divisors, whose sum is σ = 20022212174. Its totient is φ = 20022212172.

The previous prime is 20022212131. The next prime is 20022212269. The reversal of 20022212173 is 37121222002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11555820004 + 8466392169 = 107498^2 + 92013^2 .

It is a cyclic number.

It is not a de Polignac number, because 20022212173 - 2²⁹ = 19485341261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20022212113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10011106086 + 10011106087.

It is an arithmetic number, because the mean of its divisors is an integer number (10011106087).

Almost surely, 2^20022212173 is an apocalyptic number.

It is an amenable number.

20022212173 is a deficient number, since it is larger than the sum of its proper divisors (1).

20022212173 is an equidigital number, since it uses as much as digits as its factorization.

20022212173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 22.

Adding to 20022212173 its reverse (37121222002), we get a palindrome (57143434175).

The spelling of 20022212173 in words is "twenty billion, twenty-two million, two hundred twelve thousand, one hundred seventy-three".