21533134335 has 16 divisors (see below), whose sum is σ = 34457170560. Its totient is φ = 11482953120.

The previous prime is 21533134279. The next prime is 21533134349. The reversal of 21533134335 is 53343133512.

It is not a de Polignac number, because 21533134335 - 2¹⁰ = 21533133311 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21533134296 and 21533134305.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48756 + ... + 213174.

It is an arithmetic number, because the mean of its divisors is an integer number (2153573160).

Almost surely, 2^21533134335 is an apocalyptic number.

21533134335 is a deficient number, since it is larger than the sum of its proper divisors (12924036225).

21533134335 is a wasteful number, since it uses less digits than its factorization.

21533134335 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173158.

The product of its digits is 48600, while the sum is 33.

Adding to 21533134335 its reverse (53343133512), we get a palindrome (74876267847).

The spelling of 21533134335 in words is "twenty-one billion, five hundred thirty-three million, one hundred thirty-four thousand, three hundred thirty-five".