20841216371 has 4 divisors (see below), whose sum is σ = 20845760544. Its totient is φ = 20836672200.

The previous prime is 20841216367. The next prime is 20841216449. The reversal of 20841216371 is 17361214802.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20841216371 - 2² = 20841216367 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20841216301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2265200 + ... + 2274381.

It is an arithmetic number, because the mean of its divisors is an integer number (5211440136).

Almost surely, 2^20841216371 is an apocalyptic number.

20841216371 is a deficient number, since it is larger than the sum of its proper divisors (4544173).

20841216371 is an equidigital number, since it uses as much as digits as its factorization.

20841216371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4544172.

The product of its (nonzero) digits is 16128, while the sum is 35.

The spelling of 20841216371 in words is "twenty billion, eight hundred forty-one million, two hundred sixteen thousand, three hundred seventy-one".