20945028786 has 64 divisors (see below), whose sum is σ = 46025625600. Its totient is φ = 6301627200.

The previous prime is 20945028751. The next prime is 20945028827. The reversal of 20945028786 is 68782054902.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11706780 + ... + 11708568.

It is an arithmetic number, because the mean of its divisors is an integer number (719150400).

Almost surely, 2^20945028786 is an apocalyptic number.

20945028786 is an abundant number, since it is smaller than the sum of its proper divisors (25080596814).

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

20945028786 is a wasteful number, since it uses less digits than its factorization.

20945028786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2975.

The product of its (nonzero) digits is 1935360, while the sum is 51.

The spelling of 20945028786 in words is "twenty billion, nine hundred forty-five million, twenty-eight thousand, seven hundred eighty-six".