21541013332 has 6 divisors (see below), whose sum is σ = 37696773338. Its totient is φ = 10770506664.

The previous prime is 21541013321. The next prime is 21541013353. The reversal of 21541013332 is 23331014512.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 16932775876 + 4608237456 = 130126^2 + 67884^2 .

It is a super-3 number, since 3×21541013332³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21541013297 and 21541013306.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 2692626663 + ... + 2692626670.

Almost surely, 2^21541013332 is an apocalyptic number.

It is an amenable number.

21541013332 is a deficient number, since it is larger than the sum of its proper divisors (16155760006).

21541013332 is a wasteful number, since it uses less digits than its factorization.

21541013332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5385253337 (or 5385253335 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 21541013332 its reverse (23331014512), we get a palindrome (44872027844).

The spelling of 21541013332 in words is "twenty-one billion, five hundred forty-one million, thirteen thousand, three hundred thirty-two".