21632362705 has 8 divisors (see below), whose sum is σ = 25959856104. Its totient is φ = 17305209600.

The previous prime is 21632362679. The next prime is 21632362721. The reversal of 21632362705 is 50726323612.

It can be written as a sum of positive squares in 4 ways, for example, as 3581902801 + 18050459904 = 59849^2 + 134352^2 .

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

It is not a de Polignac number, because 21632362705 - 2²⁷ = 21498144977 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86095 + ... + 225115.

It is an arithmetic number, because the mean of its divisors is an integer number (3244982013).

Almost surely, 2^21632362705 is an apocalyptic number.

It is an amenable number.

21632362705 is a deficient number, since it is larger than the sum of its proper divisors (4327493399).

21632362705 is a wasteful number, since it uses less digits than its factorization.

21632362705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170147.

The product of its (nonzero) digits is 90720, while the sum is 37.

The spelling of 21632362705 in words is "twenty-one billion, six hundred thirty-two million, three hundred sixty-two thousand, seven hundred five".