21652332055 has 8 divisors (see below), whose sum is σ = 26114692032. Its totient is φ = 17233936608.

The previous prime is 21652332041. The next prime is 21652332067. The reversal of 21652332055 is 55023325612.

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

It is a cyclic number.

It is not a de Polignac number, because 21652332055 - 2¹³ = 21652323863 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21652332055.

It is a congruent 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, 10990047 + ... + 10992016.

It is an arithmetic number, because the mean of its divisors is an integer number (3264336504).

Almost surely, 2^21652332055 is an apocalyptic number.

21652332055 is a deficient number, since it is larger than the sum of its proper divisors (4462359977).

21652332055 is a wasteful number, since it uses less digits than its factorization.

21652332055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21982265.

The product of its (nonzero) digits is 54000, while the sum is 34.

Adding to 21652332055 its reverse (55023325612), we get a palindrome (76675657667).

The spelling of 21652332055 in words is "twenty-one billion, six hundred fifty-two million, three hundred thirty-two thousand, fifty-five".