21652238345 has 8 divisors (see below), whose sum is σ = 25992894600. Its totient is φ = 17314984960.

The previous prime is 21652238317. The next prime is 21652238351. The reversal of 21652238345 is 54383225612.

It can be written as a sum of positive squares in 4 ways, for example, as 5659853824 + 15992384521 = 75232^2 + 126461^2 .

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

It is not a de Polignac number, because 21652238345 - 2²⁸ = 21383802889 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 836696 + ... + 862185.

It is an arithmetic number, because the mean of its divisors is an integer number (3249111825).

Almost surely, 2^21652238345 is an apocalyptic number.

It is an amenable number.

21652238345 is a deficient number, since it is larger than the sum of its proper divisors (4340656255).

21652238345 is a wasteful number, since it uses less digits than its factorization.

21652238345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1701435.

The product of its digits is 345600, while the sum is 41.

The spelling of 21652238345 in words is "twenty-one billion, six hundred fifty-two million, two hundred thirty-eight thousand, three hundred forty-five".