20211304 has 16 divisors (see below), whose sum is σ = 37944000. Its totient is φ = 10092912.

The previous prime is 20211263. The next prime is 20211377. The reversal of 20211304 is 40311202.

It is a plaindrome in base 16.

It is an unprimeable number.

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, 11047 + ... + 12745.

It is an arithmetic number, because the mean of its divisors is an integer number (2371500).

Almost surely, 2^20211304 is an apocalyptic number.

It is an amenable number.

20211304 is a deficient number, since it is larger than the sum of its proper divisors (17732696).

20211304 is a wasteful number, since it uses less digits than its factorization.

20211304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3192 (or 3188 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 20211304 is about 4495.6983884598. The cubic root of 20211304 is about 272.3943601967.

Adding to 20211304 its reverse (40311202), we get a palindrome (60522506).

The spelling of 20211304 in words is "twenty million, two hundred eleven thousand, three hundred four".