20294161 has 2 divisors, whose sum is σ = 20294162. Its totient is φ = 20294160.

The previous prime is 20294137. The next prime is 20294173. The reversal of 20294161 is 16149202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16353936 + 3940225 = 4044^2 + 1985^2 .

It is a cyclic number.

It is not a de Polignac number, because 20294161 - 2¹¹ = 20292113 is a prime.

It is not a weakly prime, because it can be changed into another prime (20294861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10147080 + 10147081.

It is an arithmetic number, because the mean of its divisors is an integer number (10147081).

Almost surely, 2^20294161 is an apocalyptic number.

It is an amenable number.

20294161 is a deficient number, since it is larger than the sum of its proper divisors (1).

20294161 is an equidigital number, since it uses as much as digits as its factorization.

20294161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 20294161 is about 4504.9041055277. The cubic root of 20294161 is about 272.7660829988.

Adding to 20294161 its product of nonzero digits (864), we get a square (20295025 = 4505²).

The spelling of 20294161 in words is "twenty million, two hundred ninety-four thousand, one hundred sixty-one".