18180817105 has 24 divisors (see below), whose sum is σ = 24258084480. Its totient is φ = 12972822720.

The previous prime is 18180817099. The next prime is 18180817111. The reversal of 18180817105 is 50171808181.

It is an interprime number because it is at equal distance from previous prime (18180817099) and next prime (18180817111).

It is not a de Polignac number, because 18180817105 - 2²³ = 18172428497 is a prime.

It is a super-2 number, since 2×18180817105² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 95656 + ... + 213334.

It is an arithmetic number, because the mean of its divisors is an integer number (1010753520).

Almost surely, 2^18180817105 is an apocalyptic number.

It is an amenable number.

18180817105 is a deficient number, since it is larger than the sum of its proper divisors (6077267375).

18180817105 is a wasteful number, since it uses less digits than its factorization.

18180817105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117801 (or 117748 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 40.

The spelling of 18180817105 in words is "eighteen billion, one hundred eighty million, eight hundred seventeen thousand, one hundred five".