20880834 has 32 divisors (see below), whose sum is σ = 45831744. Its totient is φ = 6302400.

The previous prime is 20880833. The next prime is 20880877. The reversal of 20880834 is 43808802.

It is a junction number, because it is equal to n+sod(n) for n = 20880795 and 20880804.

It is not an unprimeable number, because it can be changed into a prime (20880833) 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, 1609 + ... + 6659.

It is an arithmetic number, because the mean of its divisors is an integer number (1432242).

Almost surely, 2^20880834 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20880834, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22915872).

20880834 is an abundant number, since it is smaller than the sum of its proper divisors (24950910).

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

20880834 is a wasteful number, since it uses less digits than its factorization.

20880834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5122.

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 20880834 is about 4569.5551205779. Note that the first 3 decimals coincide. The cubic root of 20880834 is about 275.3695703325.

The spelling of 20880834 in words is "twenty million, eight hundred eighty thousand, eight hundred thirty-four".