20334330 has 48 divisors (see below), whose sum is σ = 53416584. Its totient is φ = 5366400.

The previous prime is 20334317. The next prime is 20334331. The reversal of 20334330 is 3343302.

20334330 is a `hidden beast` number, since 2 + 0 + 334 + 330 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 20331081 + 3249 = 4509^2 + 57^2 .

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 (20334331) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7972 + ... + 10208.

Almost surely, 2^20334330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20334330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26708292).

20334330 is an abundant number, since it is smaller than the sum of its proper divisors (33082254).

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

20334330 is a wasteful number, since it uses less digits than its factorization.

20334330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2351 (or 2348 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 18.

The square root of 20334330 is about 4509.3602650487. The cubic root of 20334330 is about 272.9459297980.

Adding to 20334330 its reverse (3343302), we get a palindrome (23677632).

The spelling of 20334330 in words is "twenty million, three hundred thirty-four thousand, three hundred thirty".