20802834 has 48 divisors (see below), whose sum is σ = 51105600. Its totient is φ = 6062688.

The previous prime is 20802823. The next prime is 20802839. The reversal of 20802834 is 43820802.

It is a junction number, because it is equal to n+sod(n) for n = 20802798 and 20802807.

It is not an unprimeable number, because it can be changed into a prime (20802839) 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 23 ways as a sum of consecutive naturals, for example, 2107 + ... + 6785.

It is an arithmetic number, because the mean of its divisors is an integer number (1064700).

Almost surely, 2^20802834 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20802834, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25552800).

20802834 is an abundant number, since it is smaller than the sum of its proper divisors (30302766).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20802834 is a wasteful number, since it uses less digits than its factorization.

20802834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4719 (or 4716 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 20802834 is about 4561.0123876175. The cubic root of 20802834 is about 275.0262630565.

The spelling of 20802834 in words is "twenty million, eight hundred two thousand, eight hundred thirty-four".