21489363832 has 16 divisors (see below), whose sum is σ = 40669124760. Its totient is φ = 10644263904.

The previous prime is 21489363823. The next prime is 21489363881. The reversal of 21489363832 is 23836398412.

It is a congruent number.

It is an unprimeable number.

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, 12551343 + ... + 12553054.

Almost surely, 2^21489363832 is an apocalyptic number.

It is an amenable number.

21489363832 is a deficient number, since it is larger than the sum of its proper divisors (19179760928).

21489363832 is a wasteful number, since it uses less digits than its factorization.

21489363832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25104510 (or 25104506 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 49.

The spelling of 21489363832 in words is "twenty-one billion, four hundred eighty-nine million, three hundred sixty-three thousand, eight hundred thirty-two".