21732215258 has 8 divisors (see below), whose sum is σ = 35105886228. Its totient is φ = 10030253184.

The previous prime is 21732215249. The next prime is 21732215261. The reversal of 21732215258 is 85251223712.

It is a happy number.

21732215258 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 15427378849 + 6304836409 = 124207^2 + 79403^2 .

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

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 3 ways as a sum of consecutive naturals, for example, 417927191 + ... + 417927242.

Almost surely, 2^21732215258 is an apocalyptic number.

21732215258 is a deficient number, since it is larger than the sum of its proper divisors (13373670970).

21732215258 is a wasteful number, since it uses less digits than its factorization.

21732215258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 835854448.

The product of its digits is 67200, while the sum is 38.

The spelling of 21732215258 in words is "twenty-one billion, seven hundred thirty-two million, two hundred fifteen thousand, two hundred fifty-eight".