20512421327 has 2 divisors, whose sum is σ = 20512421328. Its totient is φ = 20512421326.

The previous prime is 20512421309. The next prime is 20512421399. The reversal of 20512421327 is 72312421502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20512421327 - 2¹⁴ = 20512404943 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20512421327.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20512421827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10256210663 + 10256210664.

It is an arithmetic number, because the mean of its divisors is an integer number (10256210664).

Almost surely, 2^20512421327 is an apocalyptic number.

20512421327 is a deficient number, since it is larger than the sum of its proper divisors (1).

20512421327 is an equidigital number, since it uses as much as digits as its factorization.

20512421327 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6720, while the sum is 29.

Adding to 20512421327 its reverse (72312421502), we get a palindrome (92824842829).

The spelling of 20512421327 in words is "twenty billion, five hundred twelve million, four hundred twenty-one thousand, three hundred twenty-seven".