21131132308 has 96 divisors (see below), whose sum is σ = 44718387840. Its totient is φ = 8607306240.

The previous prime is 21131132287. The next prime is 21131132333. The reversal of 21131132308 is 80323113112.

It is a happy number.

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, 13099710 + ... + 13101322.

It is an arithmetic number, because the mean of its divisors is an integer number (465816540).

Almost surely, 2^21131132308 is an apocalyptic number.

It is an amenable number.

21131132308 is an abundant number, since it is smaller than the sum of its proper divisors (23587255532).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21131132308 is a wasteful number, since it uses less digits than its factorization.

21131132308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2297 (or 2295 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The spelling of 21131132308 in words is "twenty-one billion, one hundred thirty-one million, one hundred thirty-two thousand, three hundred eight".