20109170618 has 32 divisors (see below), whose sum is σ = 32445702144. Its totient is φ = 9324725872.

The previous prime is 20109170597. The next prime is 20109170629. The reversal of 20109170618 is 81607190102.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187871 + ... + 274797.

It is an arithmetic number, because the mean of its divisors is an integer number (1013928192).

Almost surely, 2^20109170618 is an apocalyptic number.

20109170618 is a deficient number, since it is larger than the sum of its proper divisors (12336531526).

20109170618 is a wasteful number, since it uses less digits than its factorization.

20109170618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87106.

The product of its (nonzero) digits is 6048, while the sum is 35.

The spelling of 20109170618 in words is "twenty billion, one hundred nine million, one hundred seventy thousand, six hundred eighteen".