20306785303 has 32 divisors (see below), whose sum is σ = 24070970880. Its totient is φ = 16770378240.

The previous prime is 20306785297. The next prime is 20306785313. The reversal of 20306785303 is 30358760302.

It is a de Polignac number, because none of the positive numbers 2^k-20306785303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20306785313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18510651 + ... + 18511747.

It is an arithmetic number, because the mean of its divisors is an integer number (752217840).

Almost surely, 2^20306785303 is an apocalyptic number.

20306785303 is a deficient number, since it is larger than the sum of its proper divisors (3764185577).

20306785303 is a wasteful number, since it uses less digits than its factorization.

20306785303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1927.

The product of its (nonzero) digits is 90720, while the sum is 37.

The spelling of 20306785303 in words is "twenty billion, three hundred six million, seven hundred eighty-five thousand, three hundred three".