20340243552 has 24 divisors (see below), whose sum is σ = 53393139576. Its totient is φ = 6780081152.

The previous prime is 20340243491. The next prime is 20340243557. The reversal of 20340243552 is 25534204302.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20340243557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105938673 + ... + 105938864.

It is an arithmetic number, because the mean of its divisors is an integer number (2224714149).

Almost surely, 2^20340243552 is an apocalyptic number.

It is an amenable number.

20340243552 is an abundant number, since it is smaller than the sum of its proper divisors (33052896024).

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

20340243552 is a wasteful number, since it uses less digits than its factorization.

20340243552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211877550 (or 211877542 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 30.

Adding to 20340243552 its reverse (25534204302), we get a palindrome (45874447854).

The spelling of 20340243552 in words is "twenty billion, three hundred forty million, two hundred forty-three thousand, five hundred fifty-two".