20834823 has 16 divisors (see below), whose sum is σ = 28244736. Its totient is φ = 13659840.

The previous prime is 20834813. The next prime is 20834851. The reversal of 20834823 is 32843802.

It is a de Polignac number, because none of the positive numbers 2^k-20834823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20834813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66838 + ... + 67148.

It is an arithmetic number, because the mean of its divisors is an integer number (1765296).

Almost surely, 2^20834823 is an apocalyptic number.

20834823 is a deficient number, since it is larger than the sum of its proper divisors (7409913).

20834823 is a wasteful number, since it uses less digits than its factorization.

20834823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614.

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 20834823 is about 4564.5178277667. The cubic root of 20834823 is about 275.1671622795.

The spelling of 20834823 in words is "twenty million, eight hundred thirty-four thousand, eight hundred twenty-three".