20339801 has 2 divisors, whose sum is σ = 20339802. Its totient is φ = 20339800.

The previous prime is 20339789. The next prime is 20339807. The reversal of 20339801 is 10893302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15054400 + 5285401 = 3880^2 + 2299^2 .

It is a cyclic number.

It is not a de Polignac number, because 20339801 - 2¹⁰ = 20338777 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 (20339807) 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, 10169900 + 10169901.

It is an arithmetic number, because the mean of its divisors is an integer number (10169901).

Almost surely, 2^20339801 is an apocalyptic number.

It is an amenable number.

20339801 is a deficient number, since it is larger than the sum of its proper divisors (1).

20339801 is an equidigital number, since it uses as much as digits as its factorization.

20339801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 20339801 is about 4509.9668513194. The cubic root of 20339801 is about 272.9704065208.

It can be divided in two parts, 203 and 39801, that added together give a palindrome (40004).

The spelling of 20339801 in words is "twenty million, three hundred thirty-nine thousand, eight hundred one".