20264161 has 2 divisors, whose sum is σ = 20264162. Its totient is φ = 20264160.

The previous prime is 20264159. The next prime is 20264171. The reversal of 20264161 is 16146202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20250000 + 14161 = 4500^2 + 119^2 .

It is a cyclic number.

It is not a de Polignac number, because 20264161 - 2¹ = 20264159 is a prime.

Together with 20264159, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20264141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10132080 + 10132081.

It is an arithmetic number, because the mean of its divisors is an integer number (10132081).

Almost surely, 2^20264161 is an apocalyptic number.

It is an amenable number.

20264161 is a deficient number, since it is larger than the sum of its proper divisors (1).

20264161 is an equidigital number, since it uses as much as digits as its factorization.

20264161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 20264161 is about 4501.5731694598. The cubic root of 20264161 is about 272.6316105268.

The spelling of 20264161 in words is "twenty million, two hundred sixty-four thousand, one hundred sixty-one".