20173136 has 20 divisors (see below), whose sum is σ = 41143200. Its totient is φ = 9555552.

The previous prime is 20173133. The next prime is 20173141. The reversal of 20173136 is 63137102.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20173133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32876 + ... + 33483.

It is an arithmetic number, because the mean of its divisors is an integer number (2057160).

Almost surely, 2^20173136 is an apocalyptic number.

It is an amenable number.

20173136 is an abundant number, since it is smaller than the sum of its proper divisors (20970064).

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

20173136 is a wasteful number, since it uses less digits than its factorization.

20173136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66386 (or 66380 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 20173136 is about 4491.4514357833. The cubic root of 20173136 is about 272.2227846040. Note that the first 3 decimals are identical.

It can be divided in two parts, 201 and 73136, that added together give a palindrome (73337).

The spelling of 20173136 in words is "twenty million, one hundred seventy-three thousand, one hundred thirty-six".