20765141 has 2 divisors, whose sum is σ = 20765142. Its totient is φ = 20765140.

The previous prime is 20765137. The next prime is 20765153. The reversal of 20765141 is 14156702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20566225 + 198916 = 4535^2 + 446^2 .

It is a cyclic number.

It is not a de Polignac number, because 20765141 - 2² = 20765137 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20765141.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20765341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10382570 + 10382571.

It is an arithmetic number, because the mean of its divisors is an integer number (10382571).

Almost surely, 2^20765141 is an apocalyptic number.

It is an amenable number.

20765141 is a deficient number, since it is larger than the sum of its proper divisors (1).

20765141 is an equidigital number, since it uses as much as digits as its factorization.

20765141 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 20765141 is about 4556.8784271692. The cubic root of 20765141 is about 274.8600544146.

The spelling of 20765141 in words is "twenty million, seven hundred sixty-five thousand, one hundred forty-one".