20313212 has 24 divisors (see below), whose sum is σ = 36578304. Its totient is φ = 9865712.

The previous prime is 20313203. The next prime is 20313229. The reversal of 20313212 is 21231302.

It is a happy number.

It is a congruent number.

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, 31073 + ... + 31719.

It is an arithmetic number, because the mean of its divisors is an integer number (1524096).

Almost surely, 2^20313212 is an apocalyptic number.

It is an amenable number.

20313212 is a deficient number, since it is larger than the sum of its proper divisors (16265092).

20313212 is a wasteful number, since it uses less digits than its factorization.

20313212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 865 (or 863 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 20313212 is about 4507.0180829458. The cubic root of 20313212 is about 272.8514087146.

Adding to 20313212 its reverse (21231302), we get a palindrome (41544514).

The spelling of 20313212 in words is "twenty million, three hundred thirteen thousand, two hundred twelve".