20250570 has 64 divisors (see below), whose sum is σ = 52410240. Its totient is φ = 4988928.

The previous prime is 20250569. The next prime is 20250577. The reversal of 20250570 is 7505202.

It is not an unprimeable number, because it can be changed into a prime (20250577) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29754 + ... + 30426.

It is an arithmetic number, because the mean of its divisors is an integer number (818910).

Almost surely, 2^20250570 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20250570, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26205120).

20250570 is an abundant number, since it is smaller than the sum of its proper divisors (32159670).

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

20250570 is a wasteful number, since it uses less digits than its factorization.

20250570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 759.

The product of its (nonzero) digits is 700, while the sum is 21.

The square root of 20250570 is about 4500.0633328877. The cubic root of 20250570 is about 272.5706463298.

Adding to 20250570 its reverse (7505202), we get a palindrome (27755772).

The spelling of 20250570 in words is "twenty million, two hundred fifty thousand, five hundred seventy".