20081250 has 192 divisors, whose sum is σ = 67495680. Its totient is φ = 4320000.

The previous prime is 20081227. The next prime is 20081263. The reversal of 20081250 is 5218002.

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

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1181242 + ... + 1181258.

It is an arithmetic number, because the mean of its divisors is an integer number (351540).

Almost surely, 2^20081250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20081250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33747840).

20081250 is an abundant number, since it is smaller than the sum of its proper divisors (47414430).

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

20081250 is an equidigital number, since it uses as much as digits as its factorization.

20081250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60 (or 34 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 20081250 is about 4481.2107738869. The cubic root of 20081250 is about 271.8088424044.

Adding to 20081250 its reverse (5218002), we get a palindrome (25299252).

The spelling of 20081250 in words is "twenty million, eighty-one thousand, two hundred fifty".