20339936 has 48 divisors (see below), whose sum is σ = 42230160. Its totient is φ = 9630720.

The previous prime is 20339909. The next prime is 20339941. The reversal of 20339936 is 63993302.

It is a junction number, because it is equal to n+sod(n) for n = 20339896 and 20339905.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48335 + ... + 48753.

It is an arithmetic number, because the mean of its divisors is an integer number (879795).

Almost surely, 2^20339936 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20339936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21115080).

20339936 is an abundant number, since it is smaller than the sum of its proper divisors (21890224).

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

20339936 is a wasteful number, since it uses less digits than its factorization.

20339936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507 (or 499 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 35.

The square root of 20339936 is about 4509.9818181452. The cubic root of 20339936 is about 272.9710104422.

The spelling of 20339936 in words is "twenty million, three hundred thirty-nine thousand, nine hundred thirty-six".