20884206217 has 8 divisors (see below), whose sum is σ = 23931655616. Its totient is φ = 17852754672.

The previous prime is 20884206199. The next prime is 20884206221. The reversal of 20884206217 is 71260248802.

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 20884206217 - 2¹¹ = 20884204169 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20884206217.

It is not an unprimeable number, because it can be changed into a prime (20884207217) 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, 3996663 + ... + 4001884.

It is an arithmetic number, because the mean of its divisors is an integer number (2991456952).

Almost surely, 2^20884206217 is an apocalyptic number.

It is an amenable number.

20884206217 is a deficient number, since it is larger than the sum of its proper divisors (3047449399).

20884206217 is an equidigital number, since it uses as much as digits as its factorization.

20884206217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7998927.

The product of its (nonzero) digits is 86016, while the sum is 40.

The spelling of 20884206217 in words is "twenty billion, eight hundred eighty-four million, two hundred six thousand, two hundred seventeen".