20782641552 has 40 divisors (see below), whose sum is σ = 55420381440. Its totient is φ = 6704077440.

The previous prime is 20782641527. The next prime is 20782641571. The reversal of 20782641552 is 25514628702.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6981927 + ... + 6984902.

It is an arithmetic number, because the mean of its divisors is an integer number (1385509536).

Almost surely, 2^20782641552 is an apocalyptic number.

It is an amenable number.

20782641552 is an abundant number, since it is smaller than the sum of its proper divisors (34637739888).

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

20782641552 is a wasteful number, since it uses less digits than its factorization.

20782641552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13966871 (or 13966865 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 42.

The spelling of 20782641552 in words is "twenty billion, seven hundred eighty-two million, six hundred forty-one thousand, five hundred fifty-two".