20775471700 has 18 divisors (see below), whose sum is σ = 45082773806. Its totient is φ = 8310188640.

The previous prime is 20775471677. The next prime is 20775471713. The reversal of 20775471700 is 717457702.

It can be written as a sum of positive squares in 3 ways, for example, as 1225280016 + 19550191684 = 35004^2 + 139822^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 103877259 + ... + 103877458.

Almost surely, 2^20775471700 is an apocalyptic number.

20775471700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20775471700 is an abundant number, since it is smaller than the sum of its proper divisors (24307302106).

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

20775471700 is a wasteful number, since it uses less digits than its factorization.

20775471700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207754731 (or 207754724 counting only the distinct ones).

The product of its (nonzero) digits is 96040, while the sum is 40.

The spelling of 20775471700 in words is "twenty billion, seven hundred seventy-five million, four hundred seventy-one thousand, seven hundred".