20203423131 has 16 divisors (see below), whose sum is σ = 27679736864. Its totient is φ = 13098392064.

The previous prime is 20203423111. The next prime is 20203423151. The reversal of 20203423131 is 13132430202.

It is an interprime number because it is at equal distance from previous prime (20203423111) and next prime (20203423151).

It is not a de Polignac number, because 20203423131 - 2⁵ = 20203423099 is a prime.

It is a super-2 number, since 2×20203423131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20203423098 and 20203423107.

It is not an unprimeable number, because it can be changed into a prime (20203423111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 183555 + ... + 272211.

It is an arithmetic number, because the mean of its divisors is an integer number (1729983554).

Almost surely, 2^20203423131 is an apocalyptic number.

20203423131 is a deficient number, since it is larger than the sum of its proper divisors (7476313733).

20203423131 is a wasteful number, since it uses less digits than its factorization.

20203423131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90750.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 20203423131 its reverse (13132430202), we get a palindrome (33335853333).

The spelling of 20203423131 in words is "twenty billion, two hundred three million, four hundred twenty-three thousand, one hundred thirty-one".