20353903 has 2 divisors, whose sum is σ = 20353904. Its totient is φ = 20353902.

The previous prime is 20353901. The next prime is 20353937. The reversal of 20353903 is 30935302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20353903 - 2¹ = 20353901 is a prime.

Together with 20353901, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20353901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10176951 + 10176952.

It is an arithmetic number, because the mean of its divisors is an integer number (10176952).

Almost surely, 2^20353903 is an apocalyptic number.

20353903 is a deficient number, since it is larger than the sum of its proper divisors (1).

20353903 is an equidigital number, since it uses as much as digits as its factorization.

20353903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2430, while the sum is 25.

The square root of 20353903 is about 4511.5300065499. The cubic root of 20353903 is about 273.0334772687.

The spelling of 20353903 in words is "twenty million, three hundred fifty-three thousand, nine hundred three".