20868242903 has 2 divisors, whose sum is σ = 20868242904. Its totient is φ = 20868242902.

The previous prime is 20868242869. The next prime is 20868242911. The reversal of 20868242903 is 30924286802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20868242903 - 2¹⁰ = 20868241879 is a prime.

It is a super-3 number, since 3×20868242903³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20868242303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10434121451 + 10434121452.

It is an arithmetic number, because the mean of its divisors is an integer number (10434121452).

Almost surely, 2^20868242903 is an apocalyptic number.

20868242903 is a deficient number, since it is larger than the sum of its proper divisors (1).

20868242903 is an equidigital number, since it uses as much as digits as its factorization.

20868242903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 331776, while the sum is 44.

The spelling of 20868242903 in words is "twenty billion, eight hundred sixty-eight million, two hundred forty-two thousand, nine hundred three".