20863312 has 20 divisors (see below), whose sum is σ = 40640256. Its totient is φ = 10375520.

The previous prime is 20863309. The next prime is 20863313. The reversal of 20863312 is 21336802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20863313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 358 + ... + 6469.

Almost surely, 2^20863312 is an apocalyptic number.

It is an amenable number.

20863312 is a deficient number, since it is larger than the sum of its proper divisors (19776944).

20863312 is a wasteful number, since it uses less digits than its factorization.

20863312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7026 (or 7020 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 20863312 is about 4567.6374637224. The cubic root of 20863312 is about 275.2925239867.

The spelling of 20863312 in words is "twenty million, eight hundred sixty-three thousand, three hundred twelve".