20225100 has 72 divisors (see below), whose sum is σ = 66884608. Its totient is φ = 4622400.

The previous prime is 20225083. The next prime is 20225123. The reversal of 20225100 is 152202.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 2716 + ... + 6915.

Almost surely, 2^20225100 is an apocalyptic number.

20225100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20225100 is an abundant number, since it is smaller than the sum of its proper divisors (46659508).

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

20225100 is a wasteful number, since it uses less digits than its factorization.

20225100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9655 (or 9648 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 20225100 is about 4497.2324823162. The cubic root of 20225100 is about 272.4563238363.

Adding to 20225100 its reverse (152202), we get a palindrome (20377302).

The spelling of 20225100 in words is "twenty million, two hundred twenty-five thousand, one hundred".