21597350822 has 8 divisors (see below), whose sum is σ = 32397613200. Its totient is φ = 10798146424.

The previous prime is 21597350821. The next prime is 21597350849. The reversal of 21597350822 is 22805379512.

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 (21597350821) 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, 211322 + ... + 296397.

It is an arithmetic number, because the mean of its divisors is an integer number (4049701650).

Almost surely, 2^21597350822 is an apocalyptic number.

21597350822 is a deficient number, since it is larger than the sum of its proper divisors (10800262378).

21597350822 is a wasteful number, since it uses less digits than its factorization.

21597350822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528990.

The product of its (nonzero) digits is 302400, while the sum is 44.

The spelling of 21597350822 in words is "twenty-one billion, five hundred ninety-seven million, three hundred fifty thousand, eight hundred twenty-two".