20120500 has 24 divisors (see below), whose sum is σ = 43944264. Its totient is φ = 8048000.

The previous prime is 20120491. The next prime is 20120501. The reversal of 20120500 is 502102.

It can be written as a sum of positive squares in 4 ways, for example, as 4088484 + 16032016 = 2022^2 + 4004^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20120501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19621 + ... + 20620.

It is an arithmetic number, because the mean of its divisors is an integer number (1831011).

Almost surely, 2^20120500 is an apocalyptic number.

20120500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20120500 is an abundant number, since it is smaller than the sum of its proper divisors (23823764).

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

20120500 is a wasteful number, since it uses less digits than its factorization.

20120500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40260 (or 40248 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 10.

The square root of 20120500 is about 4485.5880328002. The cubic root of 20120500 is about 271.9858160135.

Adding to 20120500 its reverse (502102), we get a palindrome (20622602).

The spelling of 20120500 in words is "twenty million, one hundred twenty thousand, five hundred".