20838343211 has 32 divisors (see below), whose sum is σ = 25144473600. Its totient is φ = 16891056000.

The previous prime is 20838343199. The next prime is 20838343213. The reversal of 20838343211 is 11234383802.

It is a de Polignac number, because none of the positive numbers 2^k-20838343211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20838343213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8078720 + ... + 8081298.

It is an arithmetic number, because the mean of its divisors is an integer number (785764800).

Almost surely, 2^20838343211 is an apocalyptic number.

20838343211 is a deficient number, since it is larger than the sum of its proper divisors (4306130389).

20838343211 is a wasteful number, since it uses less digits than its factorization.

20838343211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3419.

The product of its (nonzero) digits is 27648, while the sum is 35.

The spelling of 20838343211 in words is "twenty billion, eight hundred thirty-eight million, three hundred forty-three thousand, two hundred eleven".