20216275181 has 2 divisors, whose sum is σ = 20216275182. Its totient is φ = 20216275180.

The previous prime is 20216275153. The next prime is 20216275213. The reversal of 20216275181 is 18157261202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17040952681 + 3175322500 = 130541^2 + 56350^2 .

It is a cyclic number.

It is not a de Polignac number, because 20216275181 - 2³⁴ = 3036405997 is a prime.

It is a super-2 number, since 2×20216275181² (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 (20216271181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10108137590 + 10108137591.

It is an arithmetic number, because the mean of its divisors is an integer number (10108137591).

Almost surely, 2^20216275181 is an apocalyptic number.

It is an amenable number.

20216275181 is a deficient number, since it is larger than the sum of its proper divisors (1).

20216275181 is an equidigital number, since it uses as much as digits as its factorization.

20216275181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 35.

The spelling of 20216275181 in words is "twenty billion, two hundred sixteen million, two hundred seventy-five thousand, one hundred eighty-one".