18840647411 has 2 divisors, whose sum is σ = 18840647412. Its totient is φ = 18840647410.

The previous prime is 18840647381. The next prime is 18840647473. The reversal of 18840647411 is 11474604881.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18840647411 - 2¹⁰ = 18840646387 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (18840647491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9420323705 + 9420323706.

It is an arithmetic number, because the mean of its divisors is an integer number (9420323706).

Almost surely, 2^18840647411 is an apocalyptic number.

18840647411 is a deficient number, since it is larger than the sum of its proper divisors (1).

18840647411 is an equidigital number, since it uses as much as digits as its factorization.

18840647411 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 172032, while the sum is 44.

The spelling of 18840647411 in words is "eighteen billion, eight hundred forty million, six hundred forty-seven thousand, four hundred eleven".