21243333488 has 20 divisors (see below), whose sum is σ = 44325032808. Its totient is φ = 9804615360.

The previous prime is 21243333487. The next prime is 21243333511. The reversal of 21243333488 is 88433334212.

It is a super-2 number, since 2×21243333488² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21243333487) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 51065498 + ... + 51065913.

Almost surely, 2^21243333488 is an apocalyptic number.

It is an amenable number.

21243333488 is an abundant number, since it is smaller than the sum of its proper divisors (23081699320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21243333488 is a wasteful number, since it uses less digits than its factorization.

21243333488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102131432 (or 102131426 counting only the distinct ones).

The product of its digits is 331776, while the sum is 41.

The spelling of 21243333488 in words is "twenty-one billion, two hundred forty-three million, three hundred thirty-three thousand, four hundred eighty-eight".