20640230411 has 2 divisors, whose sum is σ = 20640230412. Its totient is φ = 20640230410.

The previous prime is 20640230363. The next prime is 20640230419. The reversal of 20640230411 is 11403204602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20640230411 - 2³⁴ = 3460361227 is a prime.

It is a super-2 number, since 2×20640230411² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20640230419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10320115205 + 10320115206.

It is an arithmetic number, because the mean of its divisors is an integer number (10320115206).

Almost surely, 2^20640230411 is an apocalyptic number.

20640230411 is a deficient number, since it is larger than the sum of its proper divisors (1).

20640230411 is an equidigital number, since it uses as much as digits as its factorization.

20640230411 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 23.

The spelling of 20640230411 in words is "twenty billion, six hundred forty million, two hundred thirty thousand, four hundred eleven".