20036520 has 96 divisors (see below), whose sum is σ = 74430720. Its totient is φ = 4579200.

The previous prime is 20036483. The next prime is 20036521. The reversal of 20036520 is 2563002.

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

It is a junction number, because it is equal to n+sod(n) for n = 20036493 and 20036502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20036521) 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 23 ways as a sum of consecutive naturals, for example, 1456 + ... + 6495.

It is an arithmetic number, because the mean of its divisors is an integer number (775320).

Almost surely, 2^20036520 is an apocalyptic number.

20036520 is a gapful number since it is divisible by the number (20) 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 20036520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37215360).

20036520 is an abundant number, since it is smaller than the sum of its proper divisors (54394200).

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

20036520 is a wasteful number, since it uses less digits than its factorization.

20036520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7975 (or 7968 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 20036520 is about 4476.2171529094. The cubic root of 20036520 is about 271.6068787512.

Adding to 20036520 its reverse (2563002), we get a palindrome (22599522).

The spelling of 20036520 in words is "twenty million, thirty-six thousand, five hundred twenty".