21446403332 has 12 divisors (see below), whose sum is σ = 37881965520. Its totient is φ = 10622984616.

The previous prime is 21446403317. The next prime is 21446403361. The reversal of 21446403332 is 23330464412.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25053782 + ... + 25054637.

It is an arithmetic number, because the mean of its divisors is an integer number (3156830460).

Almost surely, 2^21446403332 is an apocalyptic number.

It is an amenable number.

21446403332 is a deficient number, since it is larger than the sum of its proper divisors (16435562188).

21446403332 is a wasteful number, since it uses less digits than its factorization.

21446403332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50108530 (or 50108528 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 32.

Adding to 21446403332 its reverse (23330464412), we get a palindrome (44776867744).

The spelling of 21446403332 in words is "twenty-one billion, four hundred forty-six million, four hundred three thousand, three hundred thirty-two".