17918475971 has 16 divisors (see below), whose sum is σ = 19832242176. Its totient is φ = 16052400000.

The previous prime is 17918475947. The next prime is 17918475989. The reversal of 17918475971 is 17957481971.

It is a cyclic number.

It is not a de Polignac number, because 17918475971 - 2⁶ = 17918475907 is a prime.

It is a super-2 number, since 2×17918475971² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 17918475971.

It is not an unprimeable number, because it can be changed into a prime (17918475941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2183486 + ... + 2191676.

It is an arithmetic number, because the mean of its divisors is an integer number (1239515136).

Almost surely, 2^17918475971 is an apocalyptic number.

17918475971 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

17918475971 is a deficient number, since it is larger than the sum of its proper divisors (1913766205).

17918475971 is a wasteful number, since it uses less digits than its factorization.

17918475971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11074.

The product of its digits is 4445280, while the sum is 59.

The spelling of 17918475971 in words is "seventeen billion, nine hundred eighteen million, four hundred seventy-five thousand, nine hundred seventy-one".