20165796 has 72 divisors (see below), whose sum is σ = 59643584. Its totient is φ = 5624640.

The previous prime is 20165767. The next prime is 20165801. The reversal of 20165796 is 69756102.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 20165796.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9906 + ... + 11766.

Almost surely, 2^20165796 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20165796, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29821792).

20165796 is an abundant number, since it is smaller than the sum of its proper divisors (39477788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20165796 is a wasteful number, since it uses less digits than its factorization.

20165796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1921 (or 1916 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 20165796 is about 4490.6342536439. The cubic root of 20165796 is about 272.1897644921.

The spelling of 20165796 in words is "twenty million, one hundred sixty-five thousand, seven hundred ninety-six".