20961170600 has 24 divisors (see below), whose sum is σ = 48734722110. Its totient is φ = 8384468160.

The previous prime is 20961170539. The next prime is 20961170611. The reversal of 20961170600 is 607116902.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 11937310564 + 9023860036 = 109258^2 + 94994^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 52402727 + ... + 52403126.

Almost surely, 2^20961170600 is an apocalyptic number.

20961170600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20961170600 is an abundant number, since it is smaller than the sum of its proper divisors (27773551510).

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

20961170600 is a wasteful number, since it uses less digits than its factorization.

20961170600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104805869 (or 104805860 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 32.

The spelling of 20961170600 in words is "twenty billion, nine hundred sixty-one million, one hundred seventy thousand, six hundred".