20203131031403 has 4 divisors (see below), whose sum is σ = 20203172232528. Its totient is φ = 20203089830280.

The previous prime is 20203131031339. The next prime is 20203131031459. The reversal of 20203131031403 is 30413013130202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20203131031403 - 2⁶ = 20203131031339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20203131031103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19856063 + ... + 20848728.

It is an arithmetic number, because the mean of its divisors is an integer number (5050793058132).

Almost surely, 2^{20203131031403} is an apocalyptic number.

20203131031403 is a deficient number, since it is larger than the sum of its proper divisors (41201125).

20203131031403 is an equidigital number, since it uses as much as digits as its factorization.

20203131031403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41201124.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 20203131031403 its reverse (30413013130202), we get a palindrome (50616144161605).

The spelling of 20203131031403 in words is "twenty trillion, two hundred three billion, one hundred thirty-one million, thirty-one thousand, four hundred three".