2000023543 has 24 divisors (see below), whose sum is σ = 2457985920. Its totient is φ = 1618127280.

The previous prime is 2000023537. The next prime is 2000023547. The reversal of 2000023543 is 3453200002.

It is a de Polignac number, because none of the positive numbers 2^k-2000023543 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 2000023543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2000023547) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 259678 + ... + 267268.

It is an arithmetic number, because the mean of its divisors is an integer number (102416080).

Almost surely, 2^2000023543 is an apocalyptic number.

2000023543 is a deficient number, since it is larger than the sum of its proper divisors (457962377).

2000023543 is a wasteful number, since it uses less digits than its factorization.

2000023543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7907 (or 7900 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 19.

The square root of 2000023543 is about 44721.6227679632. The cubic root of 2000023543 is about 1259.9259935957.

Adding to 2000023543 its reverse (3453200002), we get a palindrome (5453223545).

The spelling of 2000023543 in words is "two billion, twenty-three thousand, five hundred forty-three".