20515034411 has 2 divisors, whose sum is σ = 20515034412. Its totient is φ = 20515034410.

The previous prime is 20515034383. The next prime is 20515034417. The reversal of 20515034411 is 11443051502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20515034411 - 2⁶ = 20515034347 is a prime.

It is not a weakly prime, because it can be changed into another prime (20515034417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10257517205 + 10257517206.

It is an arithmetic number, because the mean of its divisors is an integer number (10257517206).

Almost surely, 2^20515034411 is an apocalyptic number.

20515034411 is a deficient number, since it is larger than the sum of its proper divisors (1).

20515034411 is an equidigital number, since it uses as much as digits as its factorization.

20515034411 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 20515034411 its reverse (11443051502), we get a palindrome (31958085913).

The spelling of 20515034411 in words is "twenty billion, five hundred fifteen million, thirty-four thousand, four hundred eleven".