20118165 has 16 divisors (see below), whose sum is σ = 32424000. Its totient is φ = 10651392.

The previous prime is 20118107. The next prime is 20118179. The reversal of 20118165 is 56181102.

It is not a de Polignac number, because 20118165 - 2⁷ = 20118037 is a prime.

It is a congruent number.

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, 2740 + ... + 6909.

It is an arithmetic number, because the mean of its divisors is an integer number (2026500).

Almost surely, 2^20118165 is an apocalyptic number.

It is an amenable number.

20118165 is a deficient number, since it is larger than the sum of its proper divisors (12305835).

20118165 is a wasteful number, since it uses less digits than its factorization.

20118165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9796.

The product of its (nonzero) digits is 480, while the sum is 24.

The square root of 20118165 is about 4485.3277472220. The cubic root of 20118165 is about 271.9752942165.

Adding to 20118165 its reverse (56181102), we get a palindrome (76299267).

The spelling of 20118165 in words is "twenty million, one hundred eighteen thousand, one hundred sixty-five".