20834111893 has 16 divisors (see below), whose sum is σ = 24532268800. Its totient is φ = 17684403408.

The previous prime is 20834111863. The next prime is 20834111899. The reversal of 20834111893 is 39811143802.

It is not a de Polignac number, because 20834111893 - 2²¹ = 20832014741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20834111899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 259530 + ... + 330187.

It is an arithmetic number, because the mean of its divisors is an integer number (1533266800).

Almost surely, 2^20834111893 is an apocalyptic number.

It is an amenable number.

20834111893 is a deficient number, since it is larger than the sum of its proper divisors (3698156907).

20834111893 is an equidigital number, since it uses as much as digits as its factorization.

20834111893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 589841 (or 589827 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 40.

The spelling of 20834111893 in words is "twenty billion, eight hundred thirty-four million, one hundred eleven thousand, eight hundred ninety-three".