20561245112024 has 64 divisors (see below), whose sum is σ = 39670241208000. Its totient is φ = 9983590848000.

The previous prime is 20561245111991. The next prime is 20561245112029. The reversal of 20561245112024 is 42021154216502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20561245112029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 616530902 + ... + 616564250.

It is an arithmetic number, because the mean of its divisors is an integer number (619847518875).

Almost surely, 2^{20561245112024} is an apocalyptic number.

It is an amenable number.

20561245112024 is a deficient number, since it is larger than the sum of its proper divisors (19108996095976).

20561245112024 is a wasteful number, since it uses less digits than its factorization.

20561245112024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37324 (or 37320 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 35.

Adding to 20561245112024 its reverse (42021154216502), we get a palindrome (62582399328526).

The spelling of 20561245112024 in words is "twenty trillion, five hundred sixty-one billion, two hundred forty-five million, one hundred twelve thousand, twenty-four".