21403024003424 has 24 divisors (see below), whose sum is σ = 48156804008208. Its totient is φ = 9172724572800.

The previous prime is 21403024003397. The next prime is 21403024003457. The reversal of 21403024003424 is 42430042030412.

It is a super-2 number, since 2×21403024003424² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47774606927 + ... + 47774607374.

It is an arithmetic number, because the mean of its divisors is an integer number (2006533500342).

Almost surely, 2^{21403024003424} is an apocalyptic number.

It is an amenable number.

21403024003424 is an abundant number, since it is smaller than the sum of its proper divisors (26753780004784).

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

21403024003424 is an equidigital number, since it uses as much as digits as its factorization.

21403024003424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95549214318 (or 95549214310 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 21403024003424 its reverse (42430042030412), we get a palindrome (63833066033836).

The spelling of 21403024003424 in words is "twenty-one trillion, four hundred three billion, twenty-four million, three thousand, four hundred twenty-four".