21732322785 has 8 divisors (see below), whose sum is σ = 34771716480. Its totient is φ = 11590572144.

The previous prime is 21732322687. The next prime is 21732322853. The reversal of 21732322785 is 58722323712.

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

It is not a de Polignac number, because 21732322785 - 2¹² = 21732318689 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 724410745 + ... + 724410774.

It is an arithmetic number, because the mean of its divisors is an integer number (4346464560).

Almost surely, 2^21732322785 is an apocalyptic number.

It is an amenable number.

21732322785 is a deficient number, since it is larger than the sum of its proper divisors (13039393695).

21732322785 is a wasteful number, since it uses less digits than its factorization.

21732322785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1448821527.

The product of its digits is 282240, while the sum is 42.

The spelling of 21732322785 in words is "twenty-one billion, seven hundred thirty-two million, three hundred twenty-two thousand, seven hundred eighty-five".