20780905568552 has 16 divisors (see below), whose sum is σ = 38964634545600. Its totient is φ = 10390336356400.

The previous prime is 20780905568519. The next prime is 20780905568569. The reversal of 20780905568552 is 25586550908702.

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, 13792574 + ... + 15224877.

It is an arithmetic number, because the mean of its divisors is an integer number (2435289659100).

Almost surely, 2^{20780905568552} is an apocalyptic number.

It is an amenable number.

20780905568552 is a deficient number, since it is larger than the sum of its proper divisors (18183728977048).

20780905568552 is a wasteful number, since it uses less digits than its factorization.

20780905568552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29106976 (or 29106972 counting only the distinct ones).

The product of its (nonzero) digits is 60480000, while the sum is 62.

The spelling of 20780905568552 in words is "twenty trillion, seven hundred eighty billion, nine hundred five million, five hundred sixty-eight thousand, five hundred fifty-two".