17845307811 has 24 divisors (see below), whose sum is σ = 25846179840. Its totient is φ = 11864790000.

The previous prime is 17845307749. The next prime is 17845307861. The reversal of 17845307811 is 11870354871.

It is not a de Polignac number, because 17845307811 - 2¹⁴ = 17845291427 is a prime.

It is a super-2 number, since 2×17845307811² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (17845307861) 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 23 ways as a sum of consecutive naturals, for example, 6886126 + ... + 6888716.

It is an arithmetic number, because the mean of its divisors is an integer number (1076924160).

Almost surely, 2^17845307811 is an apocalyptic number.

17845307811 is a deficient number, since it is larger than the sum of its proper divisors (8000872029).

17845307811 is a wasteful number, since it uses less digits than its factorization.

17845307811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4367 (or 4364 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 45.

The spelling of 17845307811 in words is "seventeen billion, eight hundred forty-five million, three hundred seven thousand, eight hundred eleven".