20043436 has 24 divisors (see below), whose sum is σ = 40305440. Its totient is φ = 8543232.

The previous prime is 20043433. The next prime is 20043451. The reversal of 20043436 is 63434002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20043433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3550 + ... + 7258.

Almost surely, 2^20043436 is an apocalyptic number.

It is an amenable number.

20043436 is an abundant number, since it is smaller than the sum of its proper divisors (20262004).

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

20043436 is a wasteful number, since it uses less digits than its factorization.

20043436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3913 (or 3911 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 20043436 is about 4476.9896135685. The cubic root of 20043436 is about 271.6381253132.

Adding to 20043436 its reverse (63434002), we get a palindrome (83477438).

The spelling of 20043436 in words is "twenty million, forty-three thousand, four hundred thirty-six".