20001250 has 20 divisors (see below), whose sum is σ = 37492686. Its totient is φ = 8000000.

The previous prime is 20001239. The next prime is 20001253. The reversal of 20001250 is 5210002.

It can be written as a sum of positive squares in 5 ways, for example, as 1776889 + 18224361 = 1333^2 + 4269^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (20001253) by changing a digit.

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 9 ways as a sum of consecutive naturals, for example, 6751 + ... + 9250.

Almost surely, 2^20001250 is an apocalyptic number.

20001250 is a deficient number, since it is larger than the sum of its proper divisors (17491436).

20001250 is an equidigital number, since it uses as much as digits as its factorization.

20001250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16023 (or 16008 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 10.

The square root of 20001250 is about 4472.2757070646. The cubic root of 20001250 is about 271.4474165784.

Adding to 20001250 its reverse (5210002), we get a palindrome (25211252).

The spelling of 20001250 in words is "twenty million, one thousand, two hundred fifty".