20020536 has 24 divisors (see below), whose sum is σ = 54222480. Its totient is φ = 6673488.

The previous prime is 20020531. The next prime is 20020537. The reversal of 20020536 is 63502002.

It is a tau number, because it is divible by the number of its divisors (24).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020531) 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 5 ways as a sum of consecutive naturals, for example, 138960 + ... + 139103.

It is an arithmetic number, because the mean of its divisors is an integer number (2259270).

Almost surely, 2^20020536 is an apocalyptic number.

It is an amenable number.

20020536 is an abundant number, since it is smaller than the sum of its proper divisors (34201944).

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

20020536 is a wasteful number, since it uses less digits than its factorization.

20020536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278075 (or 278068 counting only the distinct ones).

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

The square root of 20020536 is about 4474.4313605195. The cubic root of 20020536 is about 271.5346353461.

Adding to 20020536 its reverse (63502002), we get a palindrome (83522538).

It can be divided in two parts, 200 and 20536, that added together give a 4-th power (20736 = 12⁴).

The spelling of 20020536 in words is "twenty million, twenty thousand, five hundred thirty-six".