20006250 has 96 divisors (see below), whose sum is σ = 55121472. Its totient is φ = 4800000.

The previous prime is 20006243. The next prime is 20006279. The reversal of 20006250 is 5260002.

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

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 206202 + ... + 206298.

It is an arithmetic number, because the mean of its divisors is an integer number (574182).

Almost surely, 2^20006250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20006250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27560736).

20006250 is an abundant number, since it is smaller than the sum of its proper divisors (35115222).

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

20006250 is an equidigital number, since it uses as much as digits as its factorization.

20006250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138 (or 118 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 20006250 is about 4472.8346716596. The cubic root of 20006250 is about 271.4700338982.

Adding to 20006250 its reverse (5260002), we get a palindrome (25266252).

The spelling of 20006250 in words is "twenty million, six thousand, two hundred fifty".