21033433135 has 16 divisors (see below), whose sum is σ = 29652729120. Its totient is φ = 14120346240.

The previous prime is 21033433129. The next prime is 21033433147. The reversal of 21033433135 is 53133433012.

It is not a de Polignac number, because 21033433135 - 2⁵ = 21033433103 is a prime.

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, 14707980 + ... + 14709409.

It is an arithmetic number, because the mean of its divisors is an integer number (1853295570).

Almost surely, 2^21033433135 is an apocalyptic number.

21033433135 is a deficient number, since it is larger than the sum of its proper divisors (8619295985).

21033433135 is a wasteful number, since it uses less digits than its factorization.

21033433135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29417418.

The product of its (nonzero) digits is 9720, while the sum is 28.

Adding to 21033433135 its reverse (53133433012), we get a palindrome (74166866147).

The spelling of 21033433135 in words is "twenty-one billion, thirty-three million, four hundred thirty-three thousand, one hundred thirty-five".