20189250 has 80 divisors (see below), whose sum is σ = 56514744. Its totient is φ = 5378400.

The previous prime is 20189233. The next prime is 20189291. The reversal of 20189250 is 5298102.

It can be written as a sum of positive squares in 4 ways, for example, as 9865881 + 10323369 = 3141^2 + 3213^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 19752 + ... + 20748.

Almost surely, 2^20189250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20189250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28257372).

20189250 is an abundant number, since it is smaller than the sum of its proper divisors (36325494).

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

20189250 is an equidigital number, since it uses as much as digits as its factorization.

20189250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1026 (or 1007 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 20189250 is about 4493.2449298920. The cubic root of 20189250 is about 272.2952478126.

The spelling of 20189250 in words is "twenty million, one hundred eighty-nine thousand, two hundred fifty".