20244570 has 64 divisors (see below), whose sum is σ = 50561280. Its totient is φ = 5184000.

The previous prime is 20244559. The next prime is 20244583. The reversal of 20244570 is 7544202.

It is a super-2 number, since 2×20244570² = 819685228969800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20244570.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 133995 + ... + 134145.

It is an arithmetic number, because the mean of its divisors is an integer number (790020).

Almost surely, 2^20244570 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20244570, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25280640).

20244570 is an abundant number, since it is smaller than the sum of its proper divisors (30316710).

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

20244570 is a wasteful number, since it uses less digits than its factorization.

20244570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311.

The product of its (nonzero) digits is 2240, while the sum is 24.

The square root of 20244570 is about 4499.3966262156. The cubic root of 20244570 is about 272.5437238708.

Adding to 20244570 its reverse (7544202), we get a palindrome (27788772).

The spelling of 20244570 in words is "twenty million, two hundred forty-four thousand, five hundred seventy".