20727865650 has 48 divisors (see below), whose sum is σ = 53640120384. Its totient is φ = 5287106880.

The previous prime is 20727865633. The next prime is 20727865657. The reversal of 20727865650 is 5656872702.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 20727865650.

It is not an unprimeable number, because it can be changed into a prime (20727865657) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3000589 + ... + 3007488.

It is an arithmetic number, because the mean of its divisors is an integer number (1117502508).

Almost surely, 2^20727865650 is an apocalyptic number.

20727865650 is an abundant number, since it is smaller than the sum of its proper divisors (32912254734).

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

20727865650 is a wasteful number, since it uses less digits than its factorization.

20727865650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6008115 (or 6008110 counting only the distinct ones).

The product of its (nonzero) digits is 1411200, while the sum is 48.

The spelling of 20727865650 in words is "twenty billion, seven hundred twenty-seven million, eight hundred sixty-five thousand, six hundred fifty".