20003555107345 has 4 divisors (see below), whose sum is σ = 24004266128820. Its totient is φ = 16002844085872.

The previous prime is 20003555107343. The next prime is 20003555107379. The reversal of 20003555107345 is 54370155530002.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4720959891729 + 15282595215616 = 2172777^2 + 3909296^2 .

It is a cyclic number.

It is not a de Polignac number, because 20003555107345 - 2¹ = 20003555107343 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 20003555107298 and 20003555107307.

It is not an unprimeable number, because it can be changed into a prime (20003555107343) 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, 2000355510730 + ... + 2000355510739.

It is an arithmetic number, because the mean of its divisors is an integer number (6001066532205).

Almost surely, 2^{20003555107345} is an apocalyptic number.

It is an amenable number.

20003555107345 is a deficient number, since it is larger than the sum of its proper divisors (4000711021475).

20003555107345 is an equidigital number, since it uses as much as digits as its factorization.

20003555107345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4000711021474.

The product of its (nonzero) digits is 315000, while the sum is 40.

The spelling of 20003555107345 in words is "twenty trillion, three billion, five hundred fifty-five million, one hundred seven thousand, three hundred forty-five".