20747814768 has 80 divisors (see below), whose sum is σ = 59595962400. Its totient is φ = 6911055360.

The previous prime is 20747814767. The next prime is 20747814779. The reversal of 20747814768 is 86741874702.

20747814768 is a `hidden beast` number, since 20 + 7 + 478 + 147 + 6 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20747814761) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 623578 + ... + 656006.

It is an arithmetic number, because the mean of its divisors is an integer number (744949530).

Almost surely, 2^20747814768 is an apocalyptic number.

It is an amenable number.

20747814768 is an abundant number, since it is smaller than the sum of its proper divisors (38848147632).

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

20747814768 is a wasteful number, since it uses less digits than its factorization.

20747814768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33927 (or 33915 counting only the distinct ones).

The product of its (nonzero) digits is 4214784, while the sum is 54.

The spelling of 20747814768 in words is "twenty billion, seven hundred forty-seven million, eight hundred fourteen thousand, seven hundred sixty-eight".