20431827511 has 2 divisors, whose sum is σ = 20431827512. Its totient is φ = 20431827510.

The previous prime is 20431827473. The next prime is 20431827539. The reversal of 20431827511 is 11572813402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20431827511 - 2¹⁹ = 20431303223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20431827571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10215913755 + 10215913756.

It is an arithmetic number, because the mean of its divisors is an integer number (10215913756).

Almost surely, 2^20431827511 is an apocalyptic number.

20431827511 is a deficient number, since it is larger than the sum of its proper divisors (1).

20431827511 is an equidigital number, since it uses as much as digits as its factorization.

20431827511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13440, while the sum is 34.

The spelling of 20431827511 in words is "twenty billion, four hundred thirty-one million, eight hundred twenty-seven thousand, five hundred eleven".