20858543113 has 4 divisors (see below), whose sum is σ = 21169864720. Its totient is φ = 20547221508.

The previous prime is 20858543077. The next prime is 20858543143. The reversal of 20858543113 is 31134585802.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31134585802 = 2 ⋅15567292901.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20858543113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20858543143) 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, 155660703 + ... + 155660836.

It is an arithmetic number, because the mean of its divisors is an integer number (5292466180).

Almost surely, 2^20858543113 is an apocalyptic number.

It is an amenable number.

20858543113 is a deficient number, since it is larger than the sum of its proper divisors (311321607).

20858543113 is an equidigital number, since it uses as much as digits as its factorization.

20858543113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311321606.

The product of its (nonzero) digits is 115200, while the sum is 40.

The spelling of 20858543113 in words is "twenty billion, eight hundred fifty-eight million, five hundred forty-three thousand, one hundred thirteen".