20746305560 has 16 divisors (see below), whose sum is σ = 46679187600. Its totient is φ = 8298522208.

The previous prime is 20746305551. The next prime is 20746305571. The reversal of 20746305560 is 6550364702.

It is a congruent number.

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, 259328780 + ... + 259328859.

It is an arithmetic number, because the mean of its divisors is an integer number (2917449225).

Almost surely, 2^20746305560 is an apocalyptic number.

20746305560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20746305560 is an abundant number, since it is smaller than the sum of its proper divisors (25932882040).

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

20746305560 is a wasteful number, since it uses less digits than its factorization.

20746305560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518657650 (or 518657646 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 38.

The spelling of 20746305560 in words is "twenty billion, seven hundred forty-six million, three hundred five thousand, five hundred sixty".