20039936 has 72 divisors (see below), whose sum is σ = 46799424. Its totient is φ = 8386560.

The previous prime is 20039933. The next prime is 20039953. The reversal of 20039936 is 63993002.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (20039933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94871 + ... + 95081.

It is an arithmetic number, because the mean of its divisors is an integer number (649992).

Almost surely, 2^20039936 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 20039936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23399712).

20039936 is an abundant number, since it is smaller than the sum of its proper divisors (26759488).

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

20039936 is an equidigital number, since it uses as much as digits as its factorization.

20039936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287 (or 273 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 32.

The square root of 20039936 is about 4476.5987088413. The cubic root of 20039936 is about 271.6223131742.

The spelling of 20039936 in words is "twenty million, thirty-nine thousand, nine hundred thirty-six".