21652332154 has 8 divisors (see below), whose sum is σ = 32479155540. Its totient is φ = 10825946976.

The previous prime is 21652332133. The next prime is 21652332209. The reversal of 21652332154 is 45123325612.

It can be written as a sum of positive squares in 2 ways, for example, as 21646354129 + 5978025 = 147127^2 + 2445^2 .

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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78622 + ... + 222454.

Almost surely, 2^21652332154 is an apocalyptic number.

21652332154 is a deficient number, since it is larger than the sum of its proper divisors (10826823386).

21652332154 is a wasteful number, since it uses less digits than its factorization.

21652332154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219104.

The product of its digits is 43200, while the sum is 34.

Adding to 21652332154 its reverse (45123325612), we get a palindrome (66775657766).

The spelling of 21652332154 in words is "twenty-one billion, six hundred fifty-two million, three hundred thirty-two thousand, one hundred fifty-four".