21014424504 has 24 divisors (see below), whose sum is σ = 56914066560. Its totient is φ = 7004808144.

The previous prime is 21014424461. The next prime is 21014424527. The reversal of 21014424504 is 40542441012.

21014424504 is a `hidden beast` number, since 2 + 10 + 144 + 2 + 4 + 504 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 145933432 + ... + 145933575.

It is an arithmetic number, because the mean of its divisors is an integer number (2371419440).

Almost surely, 2^21014424504 is an apocalyptic number.

21014424504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21014424504 is an abundant number, since it is smaller than the sum of its proper divisors (35899642056).

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

21014424504 is a wasteful number, since it uses less digits than its factorization.

21014424504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291867019 (or 291867012 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

Adding to 21014424504 its reverse (40542441012), we get a palindrome (61556865516).

The spelling of 21014424504 in words is "twenty-one billion, fourteen million, four hundred twenty-four thousand, five hundred four".