20441245520 has 20 divisors (see below), whose sum is σ = 47525896020. Its totient is φ = 8176498176.

The previous prime is 20441245507. The next prime is 20441245523. The reversal of 20441245520 is 2554214402.

It can be written as a sum of positive squares in 2 ways, for example, as 5413427776 + 15027817744 = 73576^2 + 122588^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20441245523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127757705 + ... + 127757864.

It is an arithmetic number, because the mean of its divisors is an integer number (2376294801).

Almost surely, 2^20441245520 is an apocalyptic number.

20441245520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20441245520 is an abundant number, since it is smaller than the sum of its proper divisors (27084650500).

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

20441245520 is a wasteful number, since it uses less digits than its factorization.

20441245520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255515582 (or 255515576 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 29.

Adding to 20441245520 its reverse (2554214402), we get a palindrome (22995459922).

The spelling of 20441245520 in words is "twenty billion, four hundred forty-one million, two hundred forty-five thousand, five hundred twenty".