21033410205 has 32 divisors (see below), whose sum is σ = 34573972608. Its totient is φ = 10912563200.

The previous prime is 21033410179. The next prime is 21033410213. The reversal of 21033410205 is 50201433012.

It is not a de Polignac number, because 21033410205 - 2⁶ = 21033410141 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 164125 + ... + 262685.

It is an arithmetic number, because the mean of its divisors is an integer number (1080436644).

Almost surely, 2^21033410205 is an apocalyptic number.

It is an amenable number.

21033410205 is a deficient number, since it is larger than the sum of its proper divisors (13540562403).

21033410205 is a wasteful number, since it uses less digits than its factorization.

21033410205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98957.

The product of its (nonzero) digits is 720, while the sum is 21.

Adding to 21033410205 its reverse (50201433012), we get a palindrome (71234843217).

The spelling of 21033410205 in words is "twenty-one billion, thirty-three million, four hundred ten thousand, two hundred five".