20203443403 has 16 divisors (see below), whose sum is σ = 24287510016. Its totient is φ = 16559655840.

The previous prime is 20203443397. The next prime is 20203443419. The reversal of 20203443403 is 30434430202.

It is not a de Polignac number, because 20203443403 - 2⁵ = 20203443371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20203443493) 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, 1636675 + ... + 1648972.

It is an arithmetic number, because the mean of its divisors is an integer number (1517969376).

Almost surely, 2^20203443403 is an apocalyptic number.

20203443403 is a deficient number, since it is larger than the sum of its proper divisors (4084066613).

20203443403 is a wasteful number, since it uses less digits than its factorization.

20203443403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3285714.

The product of its (nonzero) digits is 6912, while the sum is 25.

Adding to 20203443403 its reverse (30434430202), we get a palindrome (50637873605).

The spelling of 20203443403 in words is "twenty billion, two hundred three million, four hundred forty-three thousand, four hundred three".