21713569439424 has 56 divisors (see below), whose sum is σ = 57902851903488. Its totient is φ = 7180865475840.

The previous prime is 21713569439423. The next prime is 21713569439449. The reversal of 21713569439424 is 42493496531712.

It is not an unprimeable number, because it can be changed into a prime (21713569439423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 445217772 + ... + 445266539.

Almost surely, 2^{21713569439424} is an apocalyptic number.

21713569439424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21713569439424 is an abundant number, since it is smaller than the sum of its proper divisors (36189282464064).

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

21713569439424 is a wasteful number, since it uses less digits than its factorization.

21713569439424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890484453 (or 890484443 counting only the distinct ones).

The product of its digits is 39191040, while the sum is 60.

The spelling of 21713569439424 in words is "twenty-one trillion, seven hundred thirteen billion, five hundred sixty-nine million, four hundred thirty-nine thousand, four hundred twenty-four".