18471067771 has 6 divisors (see below), whose sum is σ = 20001215580. Its totient is φ = 17050216248.

The previous prime is 18471067753. The next prime is 18471067819. The reversal of 18471067771 is 17776017481.

It is a de Polignac number, because none of the positive numbers 2^k-18471067771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18471061771) 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 in 5 ways as a sum of consecutive naturals, for example, 54647961 + ... + 54648298.

It is an arithmetic number, because the mean of its divisors is an integer number (3333535930).

Almost surely, 2^18471067771 is an apocalyptic number.

18471067771 is a deficient number, since it is larger than the sum of its proper divisors (1530147809).

18471067771 is a wasteful number, since it uses less digits than its factorization.

18471067771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109296285 (or 109296272 counting only the distinct ones).

The product of its (nonzero) digits is 460992, while the sum is 49.

The spelling of 18471067771 in words is "eighteen billion, four hundred seventy-one million, sixty-seven thousand, seven hundred seventy-one".