20095861 has 2 divisors, whose sum is σ = 20095862. Its totient is φ = 20095860.

The previous prime is 20095849. The next prime is 20095871. The reversal of 20095861 is 16859002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18326961 + 1768900 = 4281^2 + 1330^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20095861 is a prime.

It is a super-3 number, since 3×20095861³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20095841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10047930 + 10047931.

It is an arithmetic number, because the mean of its divisors is an integer number (10047931).

Almost surely, 2^20095861 is an apocalyptic number.

It is an amenable number.

20095861 is a deficient number, since it is larger than the sum of its proper divisors (1).

20095861 is an equidigital number, since it uses as much as digits as its factorization.

20095861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 20095861 is about 4482.8407288236. The cubic root of 20095861 is about 271.8747485971.

The spelling of 20095861 in words is "twenty million, ninety-five thousand, eight hundred sixty-one".