20761055760 has 80 divisors (see below), whose sum is σ = 64866134016. Its totient is φ = 5492680704.

The previous prime is 20761055753. The next prime is 20761055771. The reversal of 20761055760 is 6755016702.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 310089 + ... + 371048.

Almost surely, 2^20761055760 is an apocalyptic number.

20761055760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20761055760 is an abundant number, since it is smaller than the sum of its proper divisors (44105078256).

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

20761055760 is a wasteful number, since it uses less digits than its factorization.

20761055760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681280 (or 681274 counting only the distinct ones).

The product of its (nonzero) digits is 88200, while the sum is 39.

The spelling of 20761055760 in words is "twenty billion, seven hundred sixty-one million, fifty-five thousand, seven hundred sixty".