21424055426 has 8 divisors (see below), whose sum is σ = 32137570560. Its totient is φ = 10711531908.

The previous prime is 21424055413. The next prime is 21424055441. The reversal of 21424055426 is 62455042412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 191306 + ... + 281861.

It is an arithmetic number, because the mean of its divisors is an integer number (4017196320).

Almost surely, 2^21424055426 is an apocalyptic number.

21424055426 is a deficient number, since it is larger than the sum of its proper divisors (10713515134).

21424055426 is a wasteful number, since it uses less digits than its factorization.

21424055426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495808.

The product of its (nonzero) digits is 76800, while the sum is 35.

Adding to 21424055426 its reverse (62455042412), we get a palindrome (83879097838).

The spelling of 21424055426 in words is "twenty-one billion, four hundred twenty-four million, fifty-five thousand, four hundred twenty-six".