20786805472 has 24 divisors (see below), whose sum is σ = 42244155072. Its totient is φ = 10058131200.

The previous prime is 20786805421. The next prime is 20786805497. The reversal of 20786805472 is 27450868702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10476229 + ... + 10478212.

It is an arithmetic number, because the mean of its divisors is an integer number (1760173128).

Almost surely, 2^20786805472 is an apocalyptic number.

It is an amenable number.

20786805472 is an abundant number, since it is smaller than the sum of its proper divisors (21457349600).

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

20786805472 is a wasteful number, since it uses less digits than its factorization.

20786805472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20954482 (or 20954474 counting only the distinct ones).

The product of its (nonzero) digits is 1505280, while the sum is 49.

The spelling of 20786805472 in words is "twenty billion, seven hundred eighty-six million, eight hundred five thousand, four hundred seventy-two".