21424266535 has 8 divisors (see below), whose sum is σ = 29381851296. Its totient is φ = 14690925600.

The previous prime is 21424266533. The next prime is 21424266553. The reversal of 21424266535 is 53566242412.

It is a happy number.

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

It is not a de Polignac number, because 21424266535 - 2¹ = 21424266533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21424266533) 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, 306060916 + ... + 306060985.

It is an arithmetic number, because the mean of its divisors is an integer number (3672731412).

Almost surely, 2^21424266535 is an apocalyptic number.

21424266535 is a deficient number, since it is larger than the sum of its proper divisors (7957584761).

21424266535 is an equidigital number, since it uses as much as digits as its factorization.

21424266535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612121913.

The product of its digits is 345600, while the sum is 40.

The spelling of 21424266535 in words is "twenty-one billion, four hundred twenty-four million, two hundred sixty-six thousand, five hundred thirty-five".