20343533265516 has 12 divisors (see below), whose sum is σ = 47468244286232. Its totient is φ = 6781177755168.

The previous prime is 20343533265509. The next prime is 20343533265533. The reversal of 20343533265516 is 61556233534302.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 847647219385 + ... + 847647219408.

Almost surely, 2^{20343533265516} is an apocalyptic number.

It is an amenable number.

20343533265516 is an abundant number, since it is smaller than the sum of its proper divisors (27124711020716).

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

20343533265516 is a wasteful number, since it uses less digits than its factorization.

20343533265516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1695294438800 (or 1695294438798 counting only the distinct ones).

The product of its (nonzero) digits is 5832000, while the sum is 48.

Adding to 20343533265516 its reverse (61556233534302), we get a palindrome (81899766799818).

The spelling of 20343533265516 in words is "twenty trillion, three hundred forty-three billion, five hundred thirty-three million, two hundred sixty-five thousand, five hundred sixteen".