21472489328 has 20 divisors (see below), whose sum is σ = 41786228040. Its totient is φ = 10688946624.

The previous prime is 21472489307. The next prime is 21472489351. The reversal of 21472489328 is 82398427412.

It is a super-2 number, since 2×21472489328² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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, 2952383 + ... + 2959646.

It is an arithmetic number, because the mean of its divisors is an integer number (2089311402).

Almost surely, 2^21472489328 is an apocalyptic number.

It is an amenable number.

21472489328 is a deficient number, since it is larger than the sum of its proper divisors (20313738712).

21472489328 is a wasteful number, since it uses less digits than its factorization.

21472489328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5912264 (or 5912258 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 50.

The spelling of 21472489328 in words is "twenty-one billion, four hundred seventy-two million, four hundred eighty-nine thousand, three hundred twenty-eight".