20653312 has 18 divisors (see below), whose sum is σ = 41226458. Its totient is φ = 10326528.

The previous prime is 20653309. The next prime is 20653331. The reversal of 20653312 is 21335602.

It can be written as a sum of positive squares in only one way, i.e., 14017536 + 6635776 = 3744^2 + 2576^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40083 + ... + 40594.

Almost surely, 2^20653312 is an apocalyptic number.

It is an amenable number.

20653312 is a deficient number, since it is larger than the sum of its proper divisors (20573146).

20653312 is an frugal number, since it uses more digits than its factorization.

20653312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80693 (or 80679 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 20653312 is about 4544.5915107961. The cubic root of 20653312 is about 274.3657537578.

Adding to 20653312 its reverse (21335602), we get a palindrome (41988914).

The spelling of 20653312 in words is "twenty million, six hundred fifty-three thousand, three hundred twelve".