18126572205 has 96 divisors (see below), whose sum is σ = 35485876224. Its totient is φ = 7862811264.

The previous prime is 18126572077. The next prime is 18126572227. The reversal of 18126572205 is 50227562181.

It is not a de Polignac number, because 18126572205 - 2⁷ = 18126572077 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2142714 + ... + 2151156.

It is an arithmetic number, because the mean of its divisors is an integer number (369644544).

Almost surely, 2^18126572205 is an apocalyptic number.

18126572205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18126572205 is a deficient number, since it is larger than the sum of its proper divisors (17359304019).

18126572205 is a wasteful number, since it uses less digits than its factorization.

18126572205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8615 (or 8608 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 39.

The spelling of 18126572205 in words is "eighteen billion, one hundred twenty-six million, five hundred seventy-two thousand, two hundred five".