20305271760 has 80 divisors (see below), whose sum is σ = 62964630720. Its totient is φ = 5413166080.

The previous prime is 20305271743. The next prime is 20305271809. The reversal of 20305271760 is 6717250302.

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

It is a super-2 number, since 2×20305271760² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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, 983140 + ... + 1003580.

It is an arithmetic number, because the mean of its divisors is an integer number (787057884).

Almost surely, 2^20305271760 is an apocalyptic number.

20305271760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20305271760 is an abundant number, since it is smaller than the sum of its proper divisors (42659358960).

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

20305271760 is a wasteful number, since it uses less digits than its factorization.

20305271760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24596 (or 24590 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 33.

The spelling of 20305271760 in words is "twenty billion, three hundred five million, two hundred seventy-one thousand, seven hundred sixty".