20726250 has 40 divisors (see below), whose sum is σ = 51808416. Its totient is φ = 5526000.

The previous prime is 20726239. The next prime is 20726257. The reversal of 20726250 is 5262702.

It is a self number, because there is not a number n which added to its sum of digits gives 20726250.

It is not an unprimeable number, because it can be changed into a prime (20726257) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 987 + ... + 6513.

Almost surely, 2^20726250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20726250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25904208).

20726250 is an abundant number, since it is smaller than the sum of its proper divisors (31082166).

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

20726250 is an equidigital number, since it uses as much as digits as its factorization.

20726250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5552 (or 5537 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 20726250 is about 4552.6091420196. The cubic root of 20726250 is about 274.6883521881.

Adding to 20726250 its reverse (5262702), we get a palindrome (25988952).

The spelling of 20726250 in words is "twenty million, seven hundred twenty-six thousand, two hundred fifty".