21342324089 has 2 divisors, whose sum is σ = 21342324090. Its totient is φ = 21342324088.

The previous prime is 21342324041. The next prime is 21342324103. The reversal of 21342324089 is 98042324312.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16658290489 + 4684033600 = 129067^2 + 68440^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21342324089 is a prime.

It is not a weakly prime, because it can be changed into another prime (21342324589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10671162044 + 10671162045.

It is an arithmetic number, because the mean of its divisors is an integer number (10671162045).

Almost surely, 2^21342324089 is an apocalyptic number.

It is an amenable number.

21342324089 is a deficient number, since it is larger than the sum of its proper divisors (1).

21342324089 is an equidigital number, since it uses as much as digits as its factorization.

21342324089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 38.

The spelling of 21342324089 in words is "twenty-one billion, three hundred forty-two million, three hundred twenty-four thousand, eighty-nine".