20834317 has 16 divisors (see below), whose sum is σ = 25653760. Its totient is φ = 16520112.

The previous prime is 20834249. The next prime is 20834321. The reversal of 20834317 is 71343802.

It is not a de Polignac number, because 20834317 - 2¹¹ = 20832269 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 (20834327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3898 + ... + 7540.

It is an arithmetic number, because the mean of its divisors is an integer number (1603360).

Almost surely, 2^20834317 is an apocalyptic number.

It is an amenable number.

20834317 is a deficient number, since it is larger than the sum of its proper divisors (4819443).

20834317 is a wasteful number, since it uses less digits than its factorization.

20834317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3712.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 20834317 is about 4564.4623998890. The cubic root of 20834317 is about 275.1649346674.

Subtracting from 20834317 its product of nonzero digits (4032), we obtain a triangular number (20830285 = T₆₄₅₄).

It can be divided in two parts, 2083 and 4317, that added together give a square (6400 = 80²).

The spelling of 20834317 in words is "twenty million, eight hundred thirty-four thousand, three hundred seventeen".