20053556345 has 8 divisors (see below), whose sum is σ = 24074491464. Its totient is φ = 16036029184.

The previous prime is 20053556321. The next prime is 20053556357. The reversal of 20053556345 is 54365535002.

It can be written as a sum of positive squares in 4 ways, for example, as 2139340009 + 17914216336 = 46253^2 + 133844^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20053556345 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20053556299 and 20053556308.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 839024 + ... + 862593.

It is an arithmetic number, because the mean of its divisors is an integer number (3009311433).

Almost surely, 2^20053556345 is an apocalyptic number.

It is an amenable number.

20053556345 is a deficient number, since it is larger than the sum of its proper divisors (4020935119).

20053556345 is a wasteful number, since it uses less digits than its factorization.

20053556345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1703979.

The product of its (nonzero) digits is 270000, while the sum is 38.

The spelling of 20053556345 in words is "twenty billion, fifty-three million, five hundred fifty-six thousand, three hundred forty-five".