17947258811 has 4 divisors (see below), whose sum is σ = 18891851400. Its totient is φ = 17002666224.

The previous prime is 17947258801. The next prime is 17947258831. The reversal of 17947258811 is 11885274971.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11885274971 = 6779 ⋅1753249.

It is a cyclic number.

It is not a de Polignac number, because 17947258811 - 2¹⁴ = 17947242427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17947258801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 472296266 + ... + 472296303.

It is an arithmetic number, because the mean of its divisors is an integer number (4722962850).

Almost surely, 2^17947258811 is an apocalyptic number.

17947258811 is a deficient number, since it is larger than the sum of its proper divisors (944592589).

17947258811 is an equidigital number, since it uses as much as digits as its factorization.

17947258811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 944592588.

The product of its digits is 1128960, while the sum is 53.

The spelling of 17947258811 in words is "seventeen billion, nine hundred forty-seven million, two hundred fifty-eight thousand, eight hundred eleven".