21333547689 has 8 divisors (see below), whose sum is σ = 28705691520. Its totient is φ = 14091884496.

The previous prime is 21333547663. The next prime is 21333547691. The reversal of 21333547689 is 98674533312.

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

It is not a de Polignac number, because 21333547689 - 2⁷ = 21333547561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21333547649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32619777 + ... + 32620430.

It is an arithmetic number, because the mean of its divisors is an integer number (3588211440).

Almost surely, 2^21333547689 is an apocalyptic number.

It is an amenable number.

21333547689 is a deficient number, since it is larger than the sum of its proper divisors (7372143831).

21333547689 is a wasteful number, since it uses less digits than its factorization.

21333547689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65240319.

The product of its digits is 3265920, while the sum is 51.

The spelling of 21333547689 in words is "twenty-one billion, three hundred thirty-three million, five hundred forty-seven thousand, six hundred eighty-nine".