20558243755 has 48 divisors (see below), whose sum is σ = 30028705344. Its totient is φ = 13446639360.

The previous prime is 20558243747. The next prime is 20558243773. The reversal of 20558243755 is 55734285502.

It is not a de Polignac number, because 20558243755 - 2³ = 20558243747 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2096965 + ... + 2106745.

It is an arithmetic number, because the mean of its divisors is an integer number (625598028).

Almost surely, 2^20558243755 is an apocalyptic number.

20558243755 is a deficient number, since it is larger than the sum of its proper divisors (9470461589).

20558243755 is a wasteful number, since it uses less digits than its factorization.

20558243755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10196 (or 10189 counting only the distinct ones).

The product of its (nonzero) digits is 1680000, while the sum is 46.

The spelling of 20558243755 in words is "twenty billion, five hundred fifty-eight million, two hundred forty-three thousand, seven hundred fifty-five".