20839104 has 252 divisors, whose sum is σ = 73779888. Its totient is φ = 5575680.

The previous prime is 20839097. The next prime is 20839109. The reversal of 20839104 is 40193802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20839109) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 906037 + ... + 906059.

Almost surely, 2^20839104 is an apocalyptic number.

20839104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20839104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36889944).

20839104 is an abundant number, since it is smaller than the sum of its proper divisors (52940784).

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

20839104 is a wasteful number, since it uses less digits than its factorization.

20839104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76 (or 52 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 20839104 is about 4564.9867469687. The cubic root of 20839104 is about 275.1860074912.

The spelling of 20839104 in words is "twenty million, eight hundred thirty-nine thousand, one hundred four".