20345330 has 16 divisors (see below), whose sum is σ = 37223064. Its totient is φ = 8004480.

The previous prime is 20345293. The next prime is 20345357. The reversal of 20345330 is 3354302.

It can be written as a sum of positive squares in 4 ways, for example, as 5958481 + 14386849 = 2441^2 + 3793^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16067 + ... + 17286.

Almost surely, 2^20345330 is an apocalyptic number.

20345330 is a deficient number, since it is larger than the sum of its proper divisors (16877734).

20345330 is a wasteful number, since it uses less digits than its factorization.

20345330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33421.

The product of its (nonzero) digits is 1080, while the sum is 20.

The square root of 20345330 is about 4510.5797853491. The cubic root of 20345330 is about 272.9951382712.

Adding to 20345330 its reverse (3354302), we get a palindrome (23699632).

The spelling of 20345330 in words is "twenty million, three hundred forty-five thousand, three hundred thirty".