20722448065 has 16 divisors (see below), whose sum is σ = 27325589760. Its totient is φ = 14960859520.

The previous prime is 20722448063. The next prime is 20722448093. The reversal of 20722448065 is 56084422702.

It is not a de Polignac number, because 20722448065 - 2¹ = 20722448063 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20722448063) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1367545 + ... + 1382614.

It is an arithmetic number, because the mean of its divisors is an integer number (1707849360).

Almost surely, 2^20722448065 is an apocalyptic number.

It is an amenable number.

20722448065 is a deficient number, since it is larger than the sum of its proper divisors (6603141695).

20722448065 is a wasteful number, since it uses less digits than its factorization.

20722448065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2750312.

The product of its (nonzero) digits is 215040, while the sum is 40.

The spelling of 20722448065 in words is "twenty billion, seven hundred twenty-two million, four hundred forty-eight thousand, sixty-five".