20224500 has 96 divisors (see below), whose sum is σ = 59928960. Its totient is φ = 5299200.

The previous prime is 20224483. The next prime is 20224507. The reversal of 20224500 is 542202.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20224500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20224507) 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 31 ways as a sum of consecutive naturals, for example, 145431 + ... + 145569.

It is an arithmetic number, because the mean of its divisors is an integer number (624260).

Almost surely, 2^20224500 is an apocalyptic number.

20224500 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 20224500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29964480).

20224500 is an abundant number, since it is smaller than the sum of its proper divisors (39704460).

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

20224500 is a wasteful number, since it uses less digits than its factorization.

20224500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258 (or 246 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 20224500 is about 4497.1657741293. The cubic root of 20224500 is about 272.4536295701.

Adding to 20224500 its reverse (542202), we get a palindrome (20766702).

The spelling of 20224500 in words is "twenty million, two hundred twenty-four thousand, five hundred".