18187795965 has 8 divisors (see below), whose sum is σ = 29100473568. Its totient is φ = 9700157840.

The previous prime is 18187795937. The next prime is 18187795973. The reversal of 18187795965 is 56959778181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18187795965 - 2⁹ = 18187795453 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18187795896 and 18187795905.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 606259851 + ... + 606259880.

It is an arithmetic number, because the mean of its divisors is an integer number (3637559196).

Almost surely, 2^18187795965 is an apocalyptic number.

18187795965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18187795965 is a deficient number, since it is larger than the sum of its proper divisors (10912677603).

18187795965 is a wasteful number, since it uses less digits than its factorization.

18187795965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212519739.

The product of its digits is 38102400, while the sum is 66.

The spelling of 18187795965 in words is "eighteen billion, one hundred eighty-seven million, seven hundred ninety-five thousand, nine hundred sixty-five".