1982236543 has 6 divisors (see below), whose sum is σ = 2305867056. Its totient is φ = 1699059852.

The previous prime is 1982236537. The next prime is 1982236547. The reversal of 1982236543 is 3456322891.

It is not a de Polignac number, because 1982236543 - 2²⁹ = 1445365631 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1982236543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1982236547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20226855 + ... + 20226952.

It is an arithmetic number, because the mean of its divisors is an integer number (384311176).

Almost surely, 2^1982236543 is an apocalyptic number.

1982236543 is a deficient number, since it is larger than the sum of its proper divisors (323630513).

1982236543 is an equidigital number, since it uses as much as digits as its factorization.

1982236543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40453821 (or 40453814 counting only the distinct ones).

The product of its digits is 311040, while the sum is 43.

The square root of 1982236543 is about 44522.3151127612. The cubic root of 1982236543 is about 1256.1798596252.

It can be divided in two parts, 19822 and 36543, that added together give a palindrome (56365).

The spelling of 1982236543 in words is "one billion, nine hundred eighty-two million, two hundred thirty-six thousand, five hundred forty-three".