20113055431213 has 4 divisors (see below), whose sum is σ = 20113504337980. Its totient is φ = 20112606524448.

The previous prime is 20113055431187. The next prime is 20113055431237. The reversal of 20113055431213 is 31213455031102.

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 10938081154729 + 9174974276484 = 3307277^2 + 3029022^2 .

It is a cyclic number.

It is not a de Polignac number, because 20113055431213 - 2⁹ = 20113055430701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20113055431243) 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 3 ways as a sum of consecutive naturals, for example, 224386170 + ... + 224475787.

It is an arithmetic number, because the mean of its divisors is an integer number (5028376084495).

Almost surely, 2^{20113055431213} is an apocalyptic number.

It is an amenable number.

20113055431213 is a deficient number, since it is larger than the sum of its proper divisors (448906767).

20113055431213 is an equidigital number, since it uses as much as digits as its factorization.

20113055431213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448906766.

The product of its (nonzero) digits is 10800, while the sum is 31.

The spelling of 20113055431213 in words is "twenty trillion, one hundred thirteen billion, fifty-five million, four hundred thirty-one thousand, two hundred thirteen".