20245260 has 192 divisors, whose sum is σ = 70963200. Its totient is φ = 4209408.

The previous prime is 20245259. The next prime is 20245261. The reversal of 20245260 is 6254202.

It is an interprime number because it is at equal distance from previous prime (20245259) and next prime (20245261).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20245261) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 343111 + ... + 343169.

It is an arithmetic number, because the mean of its divisors is an integer number (369600).

Almost surely, 2^20245260 is an apocalyptic number.

20245260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20245260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35481600).

20245260 is an abundant number, since it is smaller than the sum of its proper divisors (50717940).

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

20245260 is a wasteful number, since it uses less digits than its factorization.

20245260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140 (or 138 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 20245260 is about 4499.4733025100. The cubic root of 20245260 is about 272.5468202242.

Adding to 20245260 its reverse (6254202), we get a palindrome (26499462).

The spelling of 20245260 in words is "twenty million, two hundred forty-five thousand, two hundred sixty".