20023032131 has 4 divisors (see below), whose sum is σ = 20024307264. Its totient is φ = 20021757000.

The previous prime is 20023032109. The next prime is 20023032151. The reversal of 20023032131 is 13123032002.

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 20023032131 - 2¹⁰ = 20023031107 is a prime.

It is a super-2 number, since 2×20023032131² (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 (20023032151) 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, 613715 + ... + 645516.

It is an arithmetic number, because the mean of its divisors is an integer number (5006076816).

Almost surely, 2^20023032131 is an apocalyptic number.

20023032131 is a deficient number, since it is larger than the sum of its proper divisors (1275133).

20023032131 is a wasteful number, since it uses less digits than its factorization.

20023032131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1275132.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 20023032131 its reverse (13123032002), we get a palindrome (33146064133).

The spelling of 20023032131 in words is "twenty billion, twenty-three million, thirty-two thousand, one hundred thirty-one".