20722561077213 has 40 divisors (see below), whose sum is σ = 32901545019200. Its totient is φ = 12960865899072.

The previous prime is 20722561077191. The next prime is 20722561077233. The reversal of 20722561077213 is 31277016522702.

20722561077213 is a `hidden beast` number, since 2 + 0 + 7 + 2 + 2 + 5 + 610 + 7 + 7 + 21 + 3 = 666.

It is not a de Polignac number, because 20722561077213 - 2⁵ = 20722561077181 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20722561077233) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 65205328 + ... + 65522361.

It is an arithmetic number, because the mean of its divisors is an integer number (822538625480).

Almost surely, 2^{20722561077213} is an apocalyptic number.

It is an amenable number.

20722561077213 is a deficient number, since it is larger than the sum of its proper divisors (12178983941987).

20722561077213 is a wasteful number, since it uses less digits than its factorization.

20722561077213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130727823 (or 130727814 counting only the distinct ones).

The product of its (nonzero) digits is 493920, while the sum is 45.

Adding to 20722561077213 its reverse (31277016522702), we get a palindrome (51999577599915).

The spelling of 20722561077213 in words is "twenty trillion, seven hundred twenty-two billion, five hundred sixty-one million, seventy-seven thousand, two hundred thirteen".