20631304 has 16 divisors (see below), whose sum is σ = 38765520. Its totient is φ = 10293840.

The previous prime is 20631293. The next prime is 20631343. The reversal of 20631304 is 40313602.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1719 + ... + 6649.

It is an arithmetic number, because the mean of its divisors is an integer number (2422845).

Almost surely, 2^20631304 is an apocalyptic number.

It is an amenable number.

20631304 is a deficient number, since it is larger than the sum of its proper divisors (18134216).

20631304 is a wasteful number, since it uses less digits than its factorization.

20631304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5460 (or 5456 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 20631304 is about 4542.1695256782. The cubic root of 20631304 is about 274.2682651557.

Adding to 20631304 its reverse (40313602), we get a palindrome (60944906).

The spelling of 20631304 in words is "twenty million, six hundred thirty-one thousand, three hundred four".