20678712 has 16 divisors (see below), whose sum is σ = 51696840. Its totient is φ = 6892896.

The previous prime is 20678699. The next prime is 20678737. The reversal of 20678712 is 21787602.

It is a congruent number.

It is an unprimeable number.

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, 430783 + ... + 430830.

Almost surely, 2^20678712 is an apocalyptic number.

It is an amenable number.

20678712 is an abundant number, since it is smaller than the sum of its proper divisors (31018128).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20678712 is a wasteful number, since it uses less digits than its factorization.

20678712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861622 (or 861618 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 33.

The square root of 20678712 is about 4547.3851827176. The cubic root of 20678712 is about 274.4781818154.

The spelling of 20678712 in words is "twenty million, six hundred seventy-eight thousand, seven hundred twelve".