21841129689 has 16 divisors (see below), whose sum is σ = 29754266880. Its totient is φ = 14244647040.

The previous prime is 21841129669. The next prime is 21841129691. The reversal of 21841129689 is 98692114812.

It is not a de Polignac number, because 21841129689 - 2⁷ = 21841129561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21841129669) 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, 296997 + ... + 363165.

It is an arithmetic number, because the mean of its divisors is an integer number (1859641680).

Almost surely, 2^21841129689 is an apocalyptic number.

It is an amenable number.

21841129689 is a deficient number, since it is larger than the sum of its proper divisors (7913137191).

21841129689 is a wasteful number, since it uses less digits than its factorization.

21841129689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68560.

The product of its digits is 497664, while the sum is 51.

The spelling of 21841129689 in words is "twenty-one billion, eight hundred forty-one million, one hundred twenty-nine thousand, six hundred eighty-nine".