18961610011 has 2 divisors, whose sum is σ = 18961610012. Its totient is φ = 18961610010.

The previous prime is 18961609981. The next prime is 18961610023. The reversal of 18961610011 is 11001616981.

It is a strong prime.

It is an emirp because it is prime and its reverse (11001616981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18961610011 - 2¹³ = 18961601819 is a prime.

It is not a weakly prime, because it can be changed into another prime (18961610051) 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, 9480805005 + 9480805006.

It is an arithmetic number, because the mean of its divisors is an integer number (9480805006).

Almost surely, 2^18961610011 is an apocalyptic number.

18961610011 is a deficient number, since it is larger than the sum of its proper divisors (1).

18961610011 is an equidigital number, since it uses as much as digits as its factorization.

18961610011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 34.

The spelling of 18961610011 in words is "eighteen billion, nine hundred sixty-one million, six hundred ten thousand, eleven".