20165109 has 8 divisors (see below), whose sum is σ = 27133920. Its totient is φ = 13319856.

The previous prime is 20165081. The next prime is 20165129. The reversal of 20165109 is 90156102.

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

It is not a de Polignac number, because 20165109 - 2⁷ = 20164981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20165129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30507 + ... + 31160.

It is an arithmetic number, because the mean of its divisors is an integer number (3391740).

Almost surely, 2^20165109 is an apocalyptic number.

It is an amenable number.

20165109 is a deficient number, since it is larger than the sum of its proper divisors (6968811).

20165109 is a wasteful number, since it uses less digits than its factorization.

20165109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61779.

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 20165109 is about 4490.5577604569. The cubic root of 20165109 is about 272.1866735075.

The spelling of 20165109 in words is "twenty million, one hundred sixty-five thousand, one hundred nine".