21846534539 has 16 divisors (see below), whose sum is σ = 23338598400. Its totient is φ = 20377816704.

The previous prime is 21846534517. The next prime is 21846534553. The reversal of 21846534539 is 93543564812.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21846534539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21846534559) 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, 2238332 + ... + 2248070.

It is an arithmetic number, because the mean of its divisors is an integer number (1458662400).

Almost surely, 2^21846534539 is an apocalyptic number.

21846534539 is a deficient number, since it is larger than the sum of its proper divisors (1492063861).

21846534539 is a wasteful number, since it uses less digits than its factorization.

21846534539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10922.

The product of its digits is 3110400, while the sum is 50.

The spelling of 21846534539 in words is "twenty-one billion, eight hundred forty-six million, five hundred thirty-four thousand, five hundred thirty-nine".