20553101343103 has 32 divisors (see below), whose sum is σ = 25082459136000. Its totient is φ = 16497327825792.

The previous prime is 20553101343077. The next prime is 20553101343121. The reversal of 20553101343103 is 30134310135502.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-20553101343103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20553101343403) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5342226 + ... + 8345392.

It is an arithmetic number, because the mean of its divisors is an integer number (783826848000).

Almost surely, 2^{20553101343103} is an apocalyptic number.

20553101343103 is a deficient number, since it is larger than the sum of its proper divisors (4529357792897).

20553101343103 is an equidigital number, since it uses as much as digits as its factorization.

20553101343103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3003424 (or 3003390 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 31.

Adding to 20553101343103 its reverse (30134310135502), we get a palindrome (50687411478605).

The spelling of 20553101343103 in words is "twenty trillion, five hundred fifty-three billion, one hundred one million, three hundred forty-three thousand, one hundred three".