20731127 has 2 divisors, whose sum is σ = 20731128. Its totient is φ = 20731126.

The previous prime is 20731121. The next prime is 20731129. The reversal of 20731127 is 72113702.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20731127 is a prime.

Together with 20731129, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20731121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10365563 + 10365564.

It is an arithmetic number, because the mean of its divisors is an integer number (10365564).

Almost surely, 2^20731127 is an apocalyptic number.

20731127 is a deficient number, since it is larger than the sum of its proper divisors (1).

20731127 is an equidigital number, since it uses as much as digits as its factorization.

20731127 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 588, while the sum is 23.

The square root of 20731127 is about 4553.1447374315. The cubic root of 20731127 is about 274.7098957224.

Adding to 20731127 its reverse (72113702), we get a palindrome (92844829).

The spelling of 20731127 in words is "twenty million, seven hundred thirty-one thousand, one hundred twenty-seven".