20332170 has 96 divisors (see below), whose sum is σ = 56963088. Its totient is φ = 5013504.

The previous prime is 20332159. The next prime is 20332177. The reversal of 20332170 is 7123302.

It can be written as a sum of positive squares in 8 ways, for example, as 12089529 + 8242641 = 3477^2 + 2871^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20332177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 148342 + ... + 148478.

Almost surely, 2^20332170 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20332170, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28481544).

20332170 is an abundant number, since it is smaller than the sum of its proper divisors (36630918).

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

20332170 is a wasteful number, since it uses less digits than its factorization.

20332170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264 (or 261 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 18.

The square root of 20332170 is about 4509.1207568660. The cubic root of 20332170 is about 272.9362649588.

Adding to 20332170 its reverse (7123302), we get a palindrome (27455472).

It can be divided in two parts, 20332 and 170, that added together give a palindrome (20502).

The spelling of 20332170 in words is "twenty million, three hundred thirty-two thousand, one hundred seventy".