20320022131 has 4 divisors (see below), whose sum is σ = 21389497000. Its totient is φ = 19250547264.

The previous prime is 20320022117. The next prime is 20320022141. The reversal of 20320022131 is 13122002302.

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 20320022131 - 2⁹ = 20320021619 is a prime.

It is a super-2 number, since 2×20320022131² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20320022141) 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, 534737406 + ... + 534737443.

It is an arithmetic number, because the mean of its divisors is an integer number (5347374250).

Almost surely, 2^20320022131 is an apocalyptic number.

20320022131 is a deficient number, since it is larger than the sum of its proper divisors (1069474869).

20320022131 is a wasteful number, since it uses less digits than its factorization.

20320022131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1069474868.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 20320022131 its reverse (13122002302), we get a palindrome (33442024433).

The spelling of 20320022131 in words is "twenty billion, three hundred twenty million, twenty-two thousand, one hundred thirty-one".