18106639995 has 16 divisors (see below), whose sum is σ = 28974708000. Its totient is φ = 9655513344.

The previous prime is 18106639981. The next prime is 18106639997. The reversal of 18106639995 is 59993660181.

It is not a de Polignac number, because 18106639995 - 2⁴ = 18106639979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18106639997) 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, 29881 + ... + 192629.

It is an arithmetic number, because the mean of its divisors is an integer number (1810919250).

Almost surely, 2^18106639995 is an apocalyptic number.

18106639995 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18106639995 is a deficient number, since it is larger than the sum of its proper divisors (10868068005).

18106639995 is a wasteful number, since it uses less digits than its factorization.

18106639995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170174.

The product of its (nonzero) digits is 3149280, while the sum is 57.

The spelling of 18106639995 in words is "eighteen billion, one hundred six million, six hundred thirty-nine thousand, nine hundred ninety-five".