20043036 has 72 divisors (see below), whose sum is σ = 55189680. Its totient is φ = 6096384.

The previous prime is 20043007. The next prime is 20043053. The reversal of 20043036 is 63034002.

20043036 is a `hidden beast` number, since 200 + 430 + 36 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52695 + ... + 53073.

Almost surely, 2^20043036 is an apocalyptic number.

20043036 is a gapful number since it is divisible by the number (26) 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 20043036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27594840).

20043036 is an abundant number, since it is smaller than the sum of its proper divisors (35146644).

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

20043036 is a wasteful number, since it uses less digits than its factorization.

20043036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515 (or 510 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 20043036 is about 4476.9449404700. The cubic root of 20043036 is about 271.6363183047.

Adding to 20043036 its reverse (63034002), we get a palindrome (83077038).

The spelling of 20043036 in words is "twenty million, forty-three thousand, thirty-six".