20385537000243 has 16 divisors (see below), whose sum is σ = 27690368030976. Its totient is φ = 13337700717600.

The previous prime is 20385537000193. The next prime is 20385537000329. The reversal of 20385537000243 is 34200073558302.

It is not a de Polignac number, because 20385537000243 - 2¹² = 20385536996147 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20385537000195 and 20385537000204.

It is not an unprimeable number, because it can be changed into a prime (20385537000643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 271053880 + ... + 271129077.

It is an arithmetic number, because the mean of its divisors is an integer number (1730648001936).

Almost surely, 2^{20385537000243} is an apocalyptic number.

20385537000243 is a deficient number, since it is larger than the sum of its proper divisors (7304831030733).

20385537000243 is a wasteful number, since it uses less digits than its factorization.

20385537000243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542183194.

The product of its (nonzero) digits is 604800, while the sum is 42.

The spelling of 20385537000243 in words is "twenty trillion, three hundred eighty-five billion, five hundred thirty-seven million, two hundred forty-three", and thus it is an aban number.