20325330 has 80 divisors (see below), whose sum is σ = 57081024. Its totient is φ = 5179680.

The previous prime is 20325311. The next prime is 20325337. The reversal of 20325330 is 3352302.

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

It is not an unprimeable number, because it can be changed into a prime (20325337) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 18085 + ... + 19175.

Almost surely, 2^20325330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20325330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28540512).

20325330 is an abundant number, since it is smaller than the sum of its proper divisors (36755694).

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

20325330 is a wasteful number, since it uses less digits than its factorization.

20325330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1133 (or 1124 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 18.

The square root of 20325330 is about 4508.3622303449. The cubic root of 20325330 is about 272.9056551184.

Adding to 20325330 its reverse (3352302), we get a palindrome (23677632).

The spelling of 20325330 in words is "twenty million, three hundred twenty-five thousand, three hundred thirty".