20540687411 has 2 divisors, whose sum is σ = 20540687412. Its totient is φ = 20540687410.

The previous prime is 20540687369. The next prime is 20540687423. The reversal of 20540687411 is 11478604502.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20540687411 is a prime.

It is not a weakly prime, because it can be changed into another prime (20540687491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10270343705 + 10270343706.

It is an arithmetic number, because the mean of its divisors is an integer number (10270343706).

Almost surely, 2^20540687411 is an apocalyptic number.

20540687411 is a deficient number, since it is larger than the sum of its proper divisors (1).

20540687411 is an equidigital number, since it uses as much as digits as its factorization.

20540687411 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 53760, while the sum is 38.

The spelling of 20540687411 in words is "twenty billion, five hundred forty million, six hundred eighty-seven thousand, four hundred eleven".