21324117089 has 32 divisors (see below), whose sum is σ = 23911041024. Its totient is φ = 18854398080.

The previous prime is 21324117083. The next prime is 21324117091. The reversal of 21324117089 is 98071142312.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21324117089 - 2⁸ = 21324116833 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21324117083) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28699652 + ... + 28700394.

It is an arithmetic number, because the mean of its divisors is an integer number (747220032).

Almost surely, 2^21324117089 is an apocalyptic number.

It is an amenable number.

21324117089 is a deficient number, since it is larger than the sum of its proper divisors (2586923935).

21324117089 is a wasteful number, since it uses less digits than its factorization.

21324117089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1277.

The product of its (nonzero) digits is 24192, while the sum is 38.

The spelling of 21324117089 in words is "twenty-one billion, three hundred twenty-four million, one hundred seventeen thousand, eighty-nine".