21705132326 has 8 divisors (see below), whose sum is σ = 33437636400. Its totient is φ = 10559253528.

The previous prime is 21705132287. The next prime is 21705132343. The reversal of 21705132326 is 62323150712.

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

It is a super-2 number, since 2×21705132326² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21705132292 and 21705132301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146656226 + ... + 146656373.

It is an arithmetic number, because the mean of its divisors is an integer number (4179704550).

Almost surely, 2^21705132326 is an apocalyptic number.

21705132326 is a deficient number, since it is larger than the sum of its proper divisors (11732504074).

21705132326 is a wasteful number, since it uses less digits than its factorization.

21705132326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293312638.

The product of its (nonzero) digits is 15120, while the sum is 32.

The spelling of 21705132326 in words is "twenty-one billion, seven hundred five million, one hundred thirty-two thousand, three hundred twenty-six".