21310500033 has 24 divisors (see below), whose sum is σ = 32125283008. Its totient is φ = 14116484304.

The previous prime is 21310500023. The next prime is 21310500037. The reversal of 21310500033 is 33000501312.

21310500033 is a `hidden beast` number, since 2 + 131 + 0 + 500 + 0 + 33 = 666.

It is not a de Polignac number, because 21310500033 - 2¹³ = 21310491841 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21310499979 and 21310500015.

It is not an unprimeable number, because it can be changed into a prime (21310500037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 241141 + ... + 317442.

Almost surely, 2^21310500033 is an apocalyptic number.

It is an amenable number.

21310500033 is a deficient number, since it is larger than the sum of its proper divisors (10814782975).

21310500033 is an equidigital number, since it uses as much as digits as its factorization.

21310500033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558755 (or 558743 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 18.

The spelling of 21310500033 in words is "twenty-one billion, three hundred ten million, five hundred thousand, thirty-three".