21335442035 has 16 divisors (see below), whose sum is σ = 26364344832. Its totient is φ = 16564838400.

The previous prime is 21335442031. The next prime is 21335442043. The reversal of 21335442035 is 53024453312.

It is not a de Polignac number, because 21335442035 - 2² = 21335442031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21335441992 and 21335442010.

It is not an unprimeable number, because it can be changed into a prime (21335442031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 233294 + ... + 311603.

It is an arithmetic number, because the mean of its divisors is an integer number (1647771552).

Almost surely, 2^21335442035 is an apocalyptic number.

21335442035 is a deficient number, since it is larger than the sum of its proper divisors (5028902797).

21335442035 is a wasteful number, since it uses less digits than its factorization.

21335442035 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545134.

The product of its (nonzero) digits is 43200, while the sum is 32.

Adding to 21335442035 its reverse (53024453312), we get a palindrome (74359895347).

The spelling of 21335442035 in words is "twenty-one billion, three hundred thirty-five million, four hundred forty-two thousand, thirty-five".