20202231131 has 4 divisors (see below), whose sum is σ = 20204102064. Its totient is φ = 20200360200.

The previous prime is 20202231103. The next prime is 20202231167. The reversal of 20202231131 is 13113220202.

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 20202231131 - 2³⁰ = 19128489307 is a prime.

It is a super-2 number, since 2×20202231131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20202231331) 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 3 ways as a sum of consecutive naturals, for example, 919175 + ... + 940896.

It is an arithmetic number, because the mean of its divisors is an integer number (5051025516).

Almost surely, 2^20202231131 is an apocalyptic number.

20202231131 is a deficient number, since it is larger than the sum of its proper divisors (1870933).

20202231131 is a wasteful number, since it uses less digits than its factorization.

20202231131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1870932.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20202231131 its reverse (13113220202), we get a palindrome (33315451333).

The spelling of 20202231131 in words is "twenty billion, two hundred two million, two hundred thirty-one thousand, one hundred thirty-one".