20541271172 has 6 divisors (see below), whose sum is σ = 35947224558. Its totient is φ = 10270635584.

The previous prime is 20541271141. The next prime is 20541271229. The reversal of 20541271172 is 27117214502.

It can be written as a sum of positive squares in only one way, i.e., 16031611456 + 4509659716 = 126616^2 + 67154^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2567658893 + ... + 2567658900.

It is an arithmetic number, because the mean of its divisors is an integer number (5991204093).

Almost surely, 2^20541271172 is an apocalyptic number.

It is an amenable number.

20541271172 is a deficient number, since it is larger than the sum of its proper divisors (15405953386).

20541271172 is a wasteful number, since it uses less digits than its factorization.

20541271172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5135317797 (or 5135317795 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 32.

Adding to 20541271172 its reverse (27117214502), we get a palindrome (47658485674).

The spelling of 20541271172 in words is "twenty billion, five hundred forty-one million, two hundred seventy-one thousand, one hundred seventy-two".