21420058848 has 48 divisors (see below), whose sum is σ = 56258052480. Its totient is φ = 7136159616.

The previous prime is 21420058843. The next prime is 21420058867. The reversal of 21420058848 is 84885002412.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21420058841) 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 7 ways as a sum of consecutive naturals, for example, 121011 + ... + 239757.

It is an arithmetic number, because the mean of its divisors is an integer number (1172042760).

Almost surely, 2^21420058848 is an apocalyptic number.

It is an amenable number.

21420058848 is an abundant number, since it is smaller than the sum of its proper divisors (34837993632).

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

21420058848 is a wasteful number, since it uses less digits than its factorization.

21420058848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120639 (or 120631 counting only the distinct ones).

The product of its (nonzero) digits is 163840, while the sum is 42.

The spelling of 21420058848 in words is "twenty-one billion, four hundred twenty million, fifty-eight thousand, eight hundred forty-eight".