17912847868 has 12 divisors (see below), whose sum is σ = 31350790240. Its totient is φ = 8955479232.

The previous prime is 17912847863. The next prime is 17912847871. The reversal of 17912847868 is 86874821971.

It is a super-2 number, since 2×17912847868² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (61) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17912847863) 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 in 3 ways as a sum of consecutive naturals, for example, 192621 + ... + 270052.

Almost surely, 2^17912847868 is an apocalyptic number.

It is an amenable number.

17912847868 is a deficient number, since it is larger than the sum of its proper divisors (13437942372).

17912847868 is a wasteful number, since it uses less digits than its factorization.

17912847868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472356 (or 472354 counting only the distinct ones).

The product of its digits is 10838016, while the sum is 61.

The spelling of 17912847868 in words is "seventeen billion, nine hundred twelve million, eight hundred forty-seven thousand, eight hundred sixty-eight".