21424757135 has 8 divisors (see below), whose sum is σ = 25755869376. Its totient is φ = 17109031840.

The previous prime is 21424757129. The next prime is 21424757177. The reversal of 21424757135 is 53175742412.

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

It is not a de Polignac number, because 21424757135 - 2¹⁸ = 21424494991 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21424757092 and 21424757101.

It is a congruent number.

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, 3843671 + ... + 3849240.

It is an arithmetic number, because the mean of its divisors is an integer number (3219483672).

Almost surely, 2^21424757135 is an apocalyptic number.

21424757135 is a deficient number, since it is larger than the sum of its proper divisors (4331112241).

21424757135 is an equidigital number, since it uses as much as digits as its factorization.

21424757135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7693473.

The product of its digits is 235200, while the sum is 41.

The spelling of 21424757135 in words is "twenty-one billion, four hundred twenty-four million, seven hundred fifty-seven thousand, one hundred thirty-five".