20672141217 has 24 divisors (see below), whose sum is σ = 34529294016. Its totient is φ = 10903985568.

The previous prime is 20672141213. The next prime is 20672141233. The reversal of 20672141217 is 71214127602.

It is not a de Polignac number, because 20672141217 - 2² = 20672141213 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20672141213) 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 23 ways as a sum of consecutive naturals, for example, 5406813 + ... + 5410634.

It is an arithmetic number, because the mean of its divisors is an integer number (1438720584).

Almost surely, 2^20672141217 is an apocalyptic number.

It is an amenable number.

20672141217 is a deficient number, since it is larger than the sum of its proper divisors (13857152799).

20672141217 is a wasteful number, since it uses less digits than its factorization.

20672141217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10817477 (or 10817470 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 33.

Adding to 20672141217 its reverse (71214127602), we get a palindrome (91886268819).

The spelling of 20672141217 in words is "twenty billion, six hundred seventy-two million, one hundred forty-one thousand, two hundred seventeen".