18980408311 has 2 divisors, whose sum is σ = 18980408312. Its totient is φ = 18980408310.

The previous prime is 18980408287. The next prime is 18980408371. The reversal of 18980408311 is 11380408981.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18980408311 - 2⁹ = 18980407799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18980408371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9490204155 + 9490204156.

It is an arithmetic number, because the mean of its divisors is an integer number (9490204156).

Almost surely, 2^18980408311 is an apocalyptic number.

18980408311 is a deficient number, since it is larger than the sum of its proper divisors (1).

18980408311 is an equidigital number, since it uses as much as digits as its factorization.

18980408311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55296, while the sum is 43.

The spelling of 18980408311 in words is "eighteen billion, nine hundred eighty million, four hundred eight thousand, three hundred eleven".