21132042005 has 32 divisors (see below), whose sum is σ = 27272678400. Its totient is φ = 15680915712.

The previous prime is 21132041999. The next prime is 21132042023. The reversal of 21132042005 is 50024023112.

It is not a de Polignac number, because 21132042005 - 2⁴ = 21132041989 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, 571211 + ... + 607079.

It is an arithmetic number, because the mean of its divisors is an integer number (852271200).

Almost surely, 2^21132042005 is an apocalyptic number.

It is an amenable number.

21132042005 is a deficient number, since it is larger than the sum of its proper divisors (6140636395).

21132042005 is a wasteful number, since it uses less digits than its factorization.

21132042005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36053.

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 21132042005 its reverse (50024023112), we get a palindrome (71156065117).

The spelling of 21132042005 in words is "twenty-one billion, one hundred thirty-two million, forty-two thousand, five".