20027131 has 2 divisors, whose sum is σ = 20027132. Its totient is φ = 20027130.

The previous prime is 20027129. The next prime is 20027177. The reversal of 20027131 is 13172002.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20027131 - 2¹ = 20027129 is a prime.

It is a super-2 number, since 2×20027131² = 802171952182322, which contains 22 as substring.

Together with 20027129, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20027531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10013565 + 10013566.

It is an arithmetic number, because the mean of its divisors is an integer number (10013566).

Almost surely, 2^20027131 is an apocalyptic number.

20027131 is a deficient number, since it is larger than the sum of its proper divisors (1).

20027131 is an equidigital number, since it uses as much as digits as its factorization.

20027131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 20027131 is about 4475.1682649929. The cubic root of 20027131 is about 271.5644476402.

Adding to 20027131 its reverse (13172002), we get a palindrome (33199133).

The spelling of 20027131 in words is "twenty million, twenty-seven thousand, one hundred thirty-one".