20353005134513 has 4 divisors (see below), whose sum is σ = 20353226673780. Its totient is φ = 20352783595248.

The previous prime is 20353005134477. The next prime is 20353005134519. The reversal of 20353005134513 is 31543150035302.

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 18459499788304 + 1893505346209 = 4296452^2 + 1376047^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20353005134513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20353005134519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110631770 + ... + 110815587.

It is an arithmetic number, because the mean of its divisors is an integer number (5088306668445).

Almost surely, 2^{20353005134513} is an apocalyptic number.

It is an amenable number.

20353005134513 is a deficient number, since it is larger than the sum of its proper divisors (221539267).

20353005134513 is an equidigital number, since it uses as much as digits as its factorization.

20353005134513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221539266.

The product of its (nonzero) digits is 81000, while the sum is 35.

Adding to 20353005134513 its reverse (31543150035302), we get a palindrome (51896155169815).

The spelling of 20353005134513 in words is "twenty trillion, three hundred fifty-three billion, five million, one hundred thirty-four thousand, five hundred thirteen".