20115442403613 has 32 divisors (see below), whose sum is σ = 32732985369600. Its totient is φ = 12152120804208.

The previous prime is 20115442403597. The next prime is 20115442403621. The reversal of 20115442403613 is 31630424451102.

20115442403613 is a `hidden beast` number, since 2 + 0 + 1 + 1 + 54 + 4 + 240 + 361 + 3 = 666.

It is not a de Polignac number, because 20115442403613 - 2⁴ = 20115442403597 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20115442403713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 852409695 + ... + 852433292.

It is an arithmetic number, because the mean of its divisors is an integer number (1022905792800).

Almost surely, 2^{20115442403613} is an apocalyptic number.

20115442403613 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20115442403613 is a deficient number, since it is larger than the sum of its proper divisors (12617542965987).

20115442403613 is a wasteful number, since it uses less digits than its factorization.

20115442403613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1704843038 (or 1704843032 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

Adding to 20115442403613 its reverse (31630424451102), we get a palindrome (51745866854715).

The spelling of 20115442403613 in words is "twenty trillion, one hundred fifteen billion, four hundred forty-two million, four hundred three thousand, six hundred thirteen".