20701841 has 2 divisors, whose sum is σ = 20701842. Its totient is φ = 20701840.

The previous prime is 20701823. The next prime is 20701847. The reversal of 20701841 is 14810702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20430400 + 271441 = 4520^2 + 521^2 .

It is a cyclic number.

It is not a de Polignac number, because 20701841 - 2¹⁰ = 20700817 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (20701847) 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, 10350920 + 10350921.

It is an arithmetic number, because the mean of its divisors is an integer number (10350921).

Almost surely, 2^20701841 is an apocalyptic number.

It is an amenable number.

20701841 is a deficient number, since it is larger than the sum of its proper divisors (1).

20701841 is an equidigital number, since it uses as much as digits as its factorization.

20701841 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 20701841 is about 4549.9275818413. The cubic root of 20701841 is about 274.5804776846.

The spelling of 20701841 in words is "twenty million, seven hundred one thousand, eight hundred forty-one".