20896816780 has 24 divisors (see below), whose sum is σ = 50152360608. Its totient is φ = 7164622848.

The previous prime is 20896816763. The next prime is 20896816793. The reversal of 20896816780 is 8761869802.

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 7 ways as a sum of consecutive naturals, for example, 74631349 + ... + 74631628.

It is an arithmetic number, because the mean of its divisors is an integer number (2089681692).

Almost surely, 2^20896816780 is an apocalyptic number.

20896816780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20896816780 is an abundant number, since it is smaller than the sum of its proper divisors (29255543828).

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

20896816780 is a wasteful number, since it uses less digits than its factorization.

20896816780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149262993 (or 149262991 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 55.

The spelling of 20896816780 in words is "twenty billion, eight hundred ninety-six million, eight hundred sixteen thousand, seven hundred eighty".