20678406584 has 32 divisors (see below), whose sum is σ = 42321970800. Its totient is φ = 9393669120.

The previous prime is 20678406577. The next prime is 20678406643. The reversal of 20678406584 is 48560487602.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80102 + ... + 218570.

Almost surely, 2^20678406584 is an apocalyptic number.

It is an amenable number.

20678406584 is an abundant number, since it is smaller than the sum of its proper divisors (21643564216).

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

20678406584 is a wasteful number, since it uses less digits than its factorization.

20678406584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140183 (or 140179 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 50.

The spelling of 20678406584 in words is "twenty billion, six hundred seventy-eight million, four hundred six thousand, five hundred eighty-four".