20335901 has 2 divisors, whose sum is σ = 20335902. Its totient is φ = 20335900.

The previous prime is 20335897. The next prime is 20335919. The reversal of 20335901 is 10953302.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20016676 + 319225 = 4474^2 + 565^2 .

It is a cyclic number.

It is not a de Polignac number, because 20335901 - 2² = 20335897 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20335981) 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, 10167950 + 10167951.

It is an arithmetic number, because the mean of its divisors is an integer number (10167951).

Almost surely, 2^20335901 is an apocalyptic number.

It is an amenable number.

20335901 is a deficient number, since it is larger than the sum of its proper divisors (1).

20335901 is an equidigital number, since it uses as much as digits as its factorization.

20335901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 810, while the sum is 23.

The square root of 20335901 is about 4509.5344549077. The cubic root of 20335901 is about 272.9529587487.

The spelling of 20335901 in words is "twenty million, three hundred thirty-five thousand, nine hundred one".