20961305050 has 24 divisors (see below), whose sum is σ = 44557746336. Its totient is φ = 7186733040.

The previous prime is 20961305041. The next prime is 20961305051. The reversal of 20961305050 is 5050316902.

It is not an unprimeable number, because it can be changed into a prime (20961305051) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29944372 + ... + 29945071.

It is an arithmetic number, because the mean of its divisors is an integer number (1856572764).

Almost surely, 2^20961305050 is an apocalyptic number.

20961305050 is an abundant number, since it is smaller than the sum of its proper divisors (23596441286).

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

20961305050 is a wasteful number, since it uses less digits than its factorization.

20961305050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59889462 (or 59889457 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 31.

The spelling of 20961305050 in words is "twenty billion, nine hundred sixty-one million, three hundred five thousand, fifty".