20043936 has 240 divisors, whose sum is σ = 69521760. Its totient is φ = 5598720.

The previous prime is 20043923. The next prime is 20043937. The reversal of 20043936 is 63934002.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (20043937) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 541710 + ... + 541746.

It is an arithmetic number, because the mean of its divisors is an integer number (289674).

Almost surely, 2^20043936 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 20043936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34760880).

20043936 is an abundant number, since it is smaller than the sum of its proper divisors (49477824).

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

20043936 is a wasteful number, since it uses less digits than its factorization.

20043936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89 (or 72 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 20043936 is about 4477.0454543147. The cubic root of 20043936 is about 271.6403840399.

Adding to 20043936 its reverse (63934002), we get a palindrome (83977938).

The spelling of 20043936 in words is "twenty million, forty-three thousand, nine hundred thirty-six".