18353870020543 has 2 divisors, whose sum is σ = 18353870020544. Its totient is φ = 18353870020542.

The previous prime is 18353870020529. The next prime is 18353870020597. The reversal of 18353870020543 is 34502007835381.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18353870020543 - 2¹³ = 18353870012351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18353870080543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9176935010271 + 9176935010272.

It is an arithmetic number, because the mean of its divisors is an integer number (9176935010272).

Almost surely, 2^{18353870020543} is an apocalyptic number.

18353870020543 is a deficient number, since it is larger than the sum of its proper divisors (1).

18353870020543 is an equidigital number, since it uses as much as digits as its factorization.

18353870020543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2419200, while the sum is 49.

The spelling of 18353870020543 in words is "eighteen trillion, three hundred fifty-three billion, eight hundred seventy million, twenty thousand, five hundred forty-three".