20317330 has 16 divisors (see below), whose sum is σ = 39896064. Its totient is φ = 7388080.

The previous prime is 20317279. The next prime is 20317337. The reversal of 20317330 is 3371302.

It is a junction number, because it is equal to n+sod(n) for n = 20317298 and 20317307.

It is not an unprimeable number, because it can be changed into a prime (20317337) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92242 + ... + 92461.

It is an arithmetic number, because the mean of its divisors is an integer number (2493504).

Almost surely, 2^20317330 is an apocalyptic number.

20317330 is a deficient number, since it is larger than the sum of its proper divisors (19578734).

20317330 is a wasteful number, since it uses less digits than its factorization.

20317330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184721.

The product of its (nonzero) digits is 378, while the sum is 19.

The square root of 20317330 is about 4507.4749028697. The cubic root of 20317330 is about 272.8698454211.

Adding to 20317330 its reverse (3371302), we get a palindrome (23688632).

It can be divided in two parts, 203173 and 30, that added together give a triangular number (203203 = T₆₃₇).

The spelling of 20317330 in words is "twenty million, three hundred seventeen thousand, three hundred thirty".