20531140027 has 2 divisors, whose sum is σ = 20531140028. Its totient is φ = 20531140026.

The previous prime is 20531140013. The next prime is 20531140043. The reversal of 20531140027 is 72004113502.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20531140027 - 2²³ = 20522751419 is a prime.

It is a super-3 number, since 3×20531140027³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20531139983 and 20531140010.

It is not a weakly prime, because it can be changed into another prime (20531144027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10265570013 + 10265570014.

It is an arithmetic number, because the mean of its divisors is an integer number (10265570014).

Almost surely, 2^20531140027 is an apocalyptic number.

20531140027 is a deficient number, since it is larger than the sum of its proper divisors (1).

20531140027 is an equidigital number, since it uses as much as digits as its factorization.

20531140027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 25.

Adding to 20531140027 its reverse (72004113502), we get a palindrome (92535253529).

The spelling of 20531140027 in words is "twenty billion, five hundred thirty-one million, one hundred forty thousand, twenty-seven".