20775700000 has 432 divisors, whose sum is σ = 60089294664. Its totient is φ = 7040000000.

The previous prime is 20775699961. The next prime is 20775700009. The reversal of 20775700000 is 757702.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 1893642256 + 18882057744 = 43516^2 + 137412^2 .

It is not an unprimeable number, because it can be changed into a prime (20775700009) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 205699950 + ... + 205700050.

Almost surely, 2^20775700000 is an apocalyptic number.

20775700000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20775700000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30044647332).

20775700000 is an abundant number, since it is smaller than the sum of its proper divisors (39313594664).

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

20775700000 is a wasteful number, since it uses less digits than its factorization.

20775700000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175 (or 136 counting only the distinct ones).

The product of its (nonzero) digits is 3430, while the sum is 28.

The spelling of 20775700000 in words is "twenty billion, seven hundred seventy-five million, seven hundred thousand".