20747053648 has 20 divisors (see below), whose sum is σ = 42313070560. Its totient is φ = 9827551584.

The previous prime is 20747053637. The next prime is 20747053669. The reversal of 20747053648 is 84635074702.

It is a junction number, because it is equal to n+sod(n) for n = 20747053598 and 20747053607.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 34123140 + ... + 34123747.

It is an arithmetic number, because the mean of its divisors is an integer number (2115653528).

Almost surely, 2^20747053648 is an apocalyptic number.

It is an amenable number.

20747053648 is an abundant number, since it is smaller than the sum of its proper divisors (21566016912).

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

20747053648 is a wasteful number, since it uses less digits than its factorization.

20747053648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68246914 (or 68246908 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 46.

The spelling of 20747053648 in words is "twenty billion, seven hundred forty-seven million, fifty-three thousand, six hundred forty-eight".