20165113 has 4 divisors (see below), whose sum is σ = 20353680. Its totient is φ = 19976548.

The previous prime is 20165081. The next prime is 20165129. The reversal of 20165113 is 31156102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31156102 = 2 ⋅15578051.

It is a cyclic number.

It is not a de Polignac number, because 20165113 - 2⁵ = 20165081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20165143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94123 + ... + 94336.

It is an arithmetic number, because the mean of its divisors is an integer number (5088420).

Almost surely, 2^20165113 is an apocalyptic number.

It is an amenable number.

20165113 is a deficient number, since it is larger than the sum of its proper divisors (188567).

20165113 is a wasteful number, since it uses less digits than its factorization.

20165113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188566.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 20165113 is about 4490.5582058359. The cubic root of 20165113 is about 272.1866915047.

The spelling of 20165113 in words is "twenty million, one hundred sixty-five thousand, one hundred thirteen".