20025900 has 72 divisors (see below), whose sum is σ = 64388240. Its totient is φ = 5339520.

The previous prime is 20025899. The next prime is 20025911. The reversal of 20025900 is 952002.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1009 + ... + 6408.

Almost surely, 2^20025900 is an apocalyptic number.

20025900 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 20025900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32194120).

20025900 is an abundant number, since it is smaller than the sum of its proper divisors (44362340).

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

20025900 is a wasteful number, since it uses less digits than its factorization.

20025900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7440 (or 7427 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 20025900 is about 4475.0307261515. The cubic root of 20025900 is about 271.5588834769.

Adding to 20025900 its reverse (952002), we get a palindrome (20977902).

The spelling of 20025900 in words is "twenty million, twenty-five thousand, nine hundred".