20972841181 has 8 divisors (see below), whose sum is σ = 21013676928. Its totient is φ = 20932032000.

The previous prime is 20972841179. The next prime is 20972841187. The reversal of 20972841181 is 18114827902.

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

It is a cyclic number.

It is not a de Polignac number, because 20972841181 - 2¹ = 20972841179 is a prime.

It is a super-2 number, since 2×20972841181² (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 (20972841187) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2322966 + ... + 2331976.

It is an arithmetic number, because the mean of its divisors is an integer number (2626709616).

Almost surely, 2^20972841181 is an apocalyptic number.

It is an amenable number.

20972841181 is a deficient number, since it is larger than the sum of its proper divisors (40835747).

20972841181 is an equidigital number, since it uses as much as digits as its factorization.

20972841181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13283.

The product of its (nonzero) digits is 64512, while the sum is 43.

The spelling of 20972841181 in words is "twenty billion, nine hundred seventy-two million, eight hundred forty-one thousand, one hundred eighty-one".