21332030312 has 8 divisors (see below), whose sum is σ = 39997556850. Its totient is φ = 10666015152.

The previous prime is 21332030299. The next prime is 21332030327. The reversal of 21332030312 is 21303023312.

It can be written as a sum of positive squares in only one way, i.e., 21215087716 + 116942596 = 145654^2 + 10814^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1333251887 + ... + 1333251902.

Almost surely, 2^21332030312 is an apocalyptic number.

It is an amenable number.

21332030312 is a deficient number, since it is larger than the sum of its proper divisors (18665526538).

21332030312 is a wasteful number, since it uses less digits than its factorization.

21332030312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2666503795 (or 2666503791 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21332030312 its reverse (21303023312), we get a palindrome (42635053624).

The spelling of 21332030312 in words is "twenty-one billion, three hundred thirty-two million, thirty thousand, three hundred twelve".