18745540070543 has 96 divisors (see below), whose sum is σ = 24432008564160. Its totient is φ = 14190238433280.

The previous prime is 18745540070531. The next prime is 18745540070549. The reversal of 18745540070543 is 34507004554781.

It is a Cunningham number, because it is equal to 4329612²-1.

It is not a de Polignac number, because 18745540070543 - 2¹⁶ = 18745540005007 is a prime.

It is a super-2 number, since 2×18745540070543² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18745540070549) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 125484071 + ... + 125633367.

It is an arithmetic number, because the mean of its divisors is an integer number (254500089210).

Almost surely, 2^{18745540070543} is an apocalyptic number.

18745540070543 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18745540070543 is a deficient number, since it is larger than the sum of its proper divisors (5686468493617).

18745540070543 is a wasteful number, since it uses less digits than its factorization.

18745540070543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149517 (or 149504 counting only the distinct ones).

The product of its (nonzero) digits is 9408000, while the sum is 53.

The spelling of 18745540070543 in words is "eighteen trillion, seven hundred forty-five billion, five hundred forty million, seventy thousand, five hundred forty-three".