20203331309 has 16 divisors (see below), whose sum is σ = 23413739520. Its totient is φ = 17074577520.

The previous prime is 20203331279. The next prime is 20203331329. The reversal of 20203331309 is 90313330202.

It is not a de Polignac number, because 20203331309 - 2³² = 15908364013 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 (20203331329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 386294 + ... + 435464.

It is an arithmetic number, because the mean of its divisors is an integer number (1463358720).

Almost surely, 2^20203331309 is an apocalyptic number.

It is an amenable number.

20203331309 is a deficient number, since it is larger than the sum of its proper divisors (3210408211).

20203331309 is an equidigital number, since it uses as much as digits as its factorization.

20203331309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50000.

The product of its (nonzero) digits is 2916, while the sum is 26.

The spelling of 20203331309 in words is "twenty billion, two hundred three million, three hundred thirty-one thousand, three hundred nine".