20660330 has 8 divisors (see below), whose sum is σ = 37188612. Its totient is φ = 8264128.

The previous prime is 20660329. The next prime is 20660333. The reversal of 20660330 is 3306602.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19456921 + 1203409 = 4411^2 + 1097^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20660333) 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, 1033007 + ... + 1033026.

Almost surely, 2^20660330 is an apocalyptic number.

20660330 is a deficient number, since it is larger than the sum of its proper divisors (16528282).

20660330 is a wasteful number, since it uses less digits than its factorization.

20660330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2066040.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 20660330 is about 4545.3635718169. The cubic root of 20660330 is about 274.3968267532.

Adding to 20660330 its reverse (3306602), we get a palindrome (23966932).

The spelling of 20660330 in words is "twenty million, six hundred sixty thousand, three hundred thirty".