21704353522 has 8 divisors (see below), whose sum is σ = 32583154176. Its totient is φ = 10843302132.

The previous prime is 21704353519. The next prime is 21704353529. The reversal of 21704353522 is 22535340712.

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

It is not an unprimeable number, because it can be changed into a prime (21704353529) 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, 4434258 + ... + 4439149.

It is an arithmetic number, because the mean of its divisors is an integer number (4072894272).

Almost surely, 2^21704353522 is an apocalyptic number.

21704353522 is a deficient number, since it is larger than the sum of its proper divisors (10878800654).

21704353522 is a wasteful number, since it uses less digits than its factorization.

21704353522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8874632.

The product of its (nonzero) digits is 50400, while the sum is 34.

The spelling of 21704353522 in words is "twenty-one billion, seven hundred four million, three hundred fifty-three thousand, five hundred twenty-two".