21054443332 has 48 divisors (see below), whose sum is σ = 39974921280. Its totient is φ = 9645257088.

The previous prime is 21054443329. The next prime is 21054443351. The reversal of 21054443332 is 23334445012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21054443294 and 21054443303.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10670298 + ... + 10672270.

It is an arithmetic number, because the mean of its divisors is an integer number (832810860).

Almost surely, 2^21054443332 is an apocalyptic number.

It is an amenable number.

21054443332 is a deficient number, since it is larger than the sum of its proper divisors (18920477948).

21054443332 is a wasteful number, since it uses less digits than its factorization.

21054443332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3412 (or 3410 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 31.

Adding to 21054443332 its reverse (23334445012), we get a palindrome (44388888344).

The spelling of 21054443332 in words is "twenty-one billion, fifty-four million, four hundred forty-three thousand, three hundred thirty-two".