20047236217 has 8 divisors (see below), whose sum is σ = 20172045600. Its totient is φ = 19922784000.

The previous prime is 20047236199. The next prime is 20047236257. The reversal of 20047236217 is 71263274002.

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 20047236217 - 2¹¹ = 20047234169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20047236257) 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, 23758 + ... + 201640.

It is an arithmetic number, because the mean of its divisors is an integer number (2521505700).

Almost surely, 2^20047236217 is an apocalyptic number.

It is an amenable number.

20047236217 is a deficient number, since it is larger than the sum of its proper divisors (124809383).

20047236217 is a wasteful number, since it uses less digits than its factorization.

20047236217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178583.

The product of its (nonzero) digits is 28224, while the sum is 34.

The spelling of 20047236217 in words is "twenty billion, forty-seven million, two hundred thirty-six thousand, two hundred seventeen".