21404420054124 has 24 divisors (see below), whose sum is σ = 49994766213168. Its totient is φ = 7127503910400.

The previous prime is 21404420054117. The next prime is 21404420054159. The reversal of 21404420054124 is 42145002440412.

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, 912834577 + ... + 912858024.

It is an arithmetic number, because the mean of its divisors is an integer number (2083115258882).

Almost surely, 2^{21404420054124} is an apocalyptic number.

It is an amenable number.

21404420054124 is an abundant number, since it is smaller than the sum of its proper divisors (28590346159044).

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

21404420054124 is a wasteful number, since it uses less digits than its factorization.

21404420054124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1825693585 (or 1825693583 counting only the distinct ones).

The product of its (nonzero) digits is 40960, while the sum is 33.

Adding to 21404420054124 its reverse (42145002440412), we get a palindrome (63549422494536).

The spelling of 21404420054124 in words is "twenty-one trillion, four hundred four billion, four hundred twenty million, fifty-four thousand, one hundred twenty-four".