21844533544859 has 2 divisors, whose sum is σ = 21844533544860. Its totient is φ = 21844533544858.

The previous prime is 21844533544793. The next prime is 21844533544879. The reversal of 21844533544859 is 95844533544812.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21844533544859 - 2²⁴ = 21844516767643 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 21844533544795 and 21844533544804.

It is not a weakly prime, because it can be changed into another prime (21844533544879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10922266772429 + 10922266772430.

It is an arithmetic number, because the mean of its divisors is an integer number (10922266772430).

Almost surely, 2^{21844533544859} is an apocalyptic number.

21844533544859 is a deficient number, since it is larger than the sum of its proper divisors (1).

21844533544859 is an equidigital number, since it uses as much as digits as its factorization.

21844533544859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 331776000, while the sum is 65.

The spelling of 21844533544859 in words is "twenty-one trillion, eight hundred forty-four billion, five hundred thirty-three million, five hundred forty-four thousand, eight hundred fifty-nine".