21458382684 has 24 divisors (see below), whose sum is σ = 50232661248. Its totient is φ = 7129494000.

The previous prime is 21458382653. The next prime is 21458382733. The reversal of 21458382684 is 48628385412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2908692 + ... + 2916059.

It is an arithmetic number, because the mean of its divisors is an integer number (2093027552).

Almost surely, 2^21458382684 is an apocalyptic number.

It is an amenable number.

21458382684 is an abundant number, since it is smaller than the sum of its proper divisors (28774278564).

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

21458382684 is a wasteful number, since it uses less digits than its factorization.

21458382684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5825065 (or 5825063 counting only the distinct ones).

The product of its digits is 2949120, while the sum is 51.

The spelling of 21458382684 in words is "twenty-one billion, four hundred fifty-eight million, three hundred eighty-two thousand, six hundred eighty-four".