20678677416 has 24 divisors (see below), whose sum is σ = 56004751530. Its totient is φ = 6892892448.

The previous prime is 20678677403. The next prime is 20678677421. The reversal of 20678677416 is 61477687602.

20678677416 is a `hidden beast` number, since 20 + 67 + 86 + 77 + 416 = 666.

It can be written as a sum of positive squares in only one way, i.e., 13052148516 + 7626528900 = 114246^2 + 87330^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 143601855 + ... + 143601998.

Almost surely, 2^20678677416 is an apocalyptic number.

It is an amenable number.

20678677416 is an abundant number, since it is smaller than the sum of its proper divisors (35326074114).

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

20678677416 is a wasteful number, since it uses less digits than its factorization.

20678677416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287203865 (or 287203858 counting only the distinct ones).

The product of its (nonzero) digits is 4741632, while the sum is 54.

The spelling of 20678677416 in words is "twenty billion, six hundred seventy-eight million, six hundred seventy-seven thousand, four hundred sixteen".