20786312 has 16 divisors (see below), whose sum is σ = 39509340. Its totient is φ = 10250496.

The previous prime is 20786279. The next prime is 20786317. The reversal of 20786312 is 21368702.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19589476 + 1196836 = 4426^2 + 1094^2 .

It is a super-2 number, since 2×20786312² = 864141533122688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20786317) by changing a digit.

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, 17213 + ... + 18380.

Almost surely, 2^20786312 is an apocalyptic number.

It is an amenable number.

20786312 is a deficient number, since it is larger than the sum of its proper divisors (18723028).

20786312 is a wasteful number, since it uses less digits than its factorization.

20786312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35672 (or 35668 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 20786312 is about 4559.2008071591. The cubic root of 20786312 is about 274.9534334375.

The spelling of 20786312 in words is "twenty million, seven hundred eighty-six thousand, three hundred twelve".