20201223169 has 2 divisors, whose sum is σ = 20201223170. Its totient is φ = 20201223168.

The previous prime is 20201223157. The next prime is 20201223221. The reversal of 20201223169 is 96132210202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10770288400 + 9430934769 = 103780^2 + 97113^2 .

It is a cyclic number.

It is not a de Polignac number, because 20201223169 - 2⁷ = 20201223041 is a prime.

It is a super-2 number, since 2×20201223169² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20201223139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100611584 + 10100611585.

It is an arithmetic number, because the mean of its divisors is an integer number (10100611585).

Almost surely, 2^20201223169 is an apocalyptic number.

It is an amenable number.

20201223169 is a deficient number, since it is larger than the sum of its proper divisors (1).

20201223169 is an equidigital number, since it uses as much as digits as its factorization.

20201223169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 28.

The spelling of 20201223169 in words is "twenty billion, two hundred one million, two hundred twenty-three thousand, one hundred sixty-nine".