20710744181 has 8 divisors (see below), whose sum is σ = 20847754200. Its totient is φ = 20573982720.

The previous prime is 20710744127. The next prime is 20710744189. The reversal of 20710744181 is 18144701702.

It can be written as a sum of positive squares in 4 ways, for example, as 338891281 + 20371852900 = 18409^2 + 142730^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20710744181 is a prime.

It is a super-2 number, since 2×20710744181² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20710744189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106565 + ... + 229733.

It is an arithmetic number, because the mean of its divisors is an integer number (2605969275).

Almost surely, 2^20710744181 is an apocalyptic number.

It is an amenable number.

20710744181 is a deficient number, since it is larger than the sum of its proper divisors (137010019).

20710744181 is a wasteful number, since it uses less digits than its factorization.

20710744181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124279.

The product of its (nonzero) digits is 12544, while the sum is 35.

The spelling of 20710744181 in words is "twenty billion, seven hundred ten million, seven hundred forty-four thousand, one hundred eighty-one".