21715746400233 has 12 divisors (see below), whose sum is σ = 31367286316548. Its totient is φ = 14477119464480.

The previous prime is 21715746400217. The next prime is 21715746400261. The reversal of 21715746400233 is 33200464751712.

It is a happy number.

21715746400233 is a `hidden beast` number, since 2 + 1 + 7 + 1 + 5 + 7 + 4 + 6 + 400 + 233 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 17925299533584 + 3790446866649 = 4233828^2 + 1946907^2 .

It is not a de Polignac number, because 21715746400233 - 2⁴ = 21715746400217 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21715748400233) 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 in 11 ways as a sum of consecutive naturals, for example, 517998 + ... + 6610583.

It is an arithmetic number, because the mean of its divisors is an integer number (2613940526379).

Almost surely, 2^{21715746400233} is an apocalyptic number.

It is an amenable number.

21715746400233 is a deficient number, since it is larger than the sum of its proper divisors (9651539916315).

21715746400233 is a wasteful number, since it uses less digits than its factorization.

21715746400233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7467064 (or 7467061 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 45.

The spelling of 21715746400233 in words is "twenty-one trillion, seven hundred fifteen billion, seven hundred forty-six million, four hundred thousand, two hundred thirty-three".