21507470375333 has 2 divisors, whose sum is σ = 21507470375334. Its totient is φ = 21507470375332.

The previous prime is 21507470375273. The next prime is 21507470375429. The reversal of 21507470375333 is 33357307470512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13043199502369 + 8464270872964 = 3611537^2 + 2909342^2 .

It is a cyclic number.

It is not a de Polignac number, because 21507470375333 - 2¹⁰ = 21507470374309 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21507470374333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10753735187666 + 10753735187667.

It is an arithmetic number, because the mean of its divisors is an integer number (10753735187667).

Almost surely, 2^{21507470375333} is an apocalyptic number.

It is an amenable number.

21507470375333 is a deficient number, since it is larger than the sum of its proper divisors (1).

21507470375333 is an equidigital number, since it uses as much as digits as its factorization.

21507470375333 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5556600, while the sum is 50.

The spelling of 21507470375333 in words is "twenty-one trillion, five hundred seven billion, four hundred seventy million, three hundred seventy-five thousand, three hundred thirty-three".