21552242489 has 8 divisors (see below), whose sum is σ = 21757870080. Its totient is φ = 21346692976.

The previous prime is 21552242479. The next prime is 21552242531. The reversal of 21552242489 is 98424225512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21552242489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21552242449) 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 7 ways as a sum of consecutive naturals, for example, 640907 + ... + 673695.

It is an arithmetic number, because the mean of its divisors is an integer number (2719733760).

Almost surely, 2^21552242489 is an apocalyptic number.

It is an amenable number.

21552242489 is a deficient number, since it is larger than the sum of its proper divisors (205627591).

21552242489 is a wasteful number, since it uses less digits than its factorization.

21552242489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39039.

The product of its digits is 460800, while the sum is 44.

The spelling of 21552242489 in words is "twenty-one billion, five hundred fifty-two million, two hundred forty-two thousand, four hundred eighty-nine".