21087284326 has 8 divisors (see below), whose sum is σ = 31678926840. Its totient is φ = 10527642048.

The previous prime is 21087284321. The next prime is 21087284333. The reversal of 21087284326 is 62348278012.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21087284321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7998411 + ... + 8001046.

It is an arithmetic number, because the mean of its divisors is an integer number (3959865855).

Almost surely, 2^21087284326 is an apocalyptic number.

21087284326 is a deficient number, since it is larger than the sum of its proper divisors (10591642514).

21087284326 is a wasteful number, since it uses less digits than its factorization.

21087284326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16000118.

The product of its (nonzero) digits is 258048, while the sum is 43.

The spelling of 21087284326 in words is "twenty-one billion, eighty-seven million, two hundred eighty-four thousand, three hundred twenty-six".