20312612 has 12 divisors (see below), whose sum is σ = 35599116. Its totient is φ = 10141440.

The previous prime is 20312597. The next prime is 20312623. The reversal of 20312612 is 21621302.

It can be written as a sum of positive squares in 2 ways, for example, as 295936 + 20016676 = 544^2 + 4474^2 .

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, 293 + ... + 6380.

It is an arithmetic number, because the mean of its divisors is an integer number (2966593).

Almost surely, 2^20312612 is an apocalyptic number.

It is an amenable number.

20312612 is a deficient number, since it is larger than the sum of its proper divisors (15286504).

20312612 is a wasteful number, since it uses less digits than its factorization.

20312612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7438 (or 7436 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 20312612 is about 4506.9515195973. The cubic root of 20312612 is about 272.8487222454.

Adding to 20312612 its reverse (21621302), we get a palindrome (41933914).

The spelling of 20312612 in words is "twenty million, three hundred twelve thousand, six hundred twelve".