21833340400537 has 4 divisors (see below), whose sum is σ = 21878172722176. Its totient is φ = 21788508078900.

The previous prime is 21833340400483. The next prime is 21833340400541. The reversal of 21833340400537 is 73500404333812.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21833340400537 - 2¹¹ = 21833340398489 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21833340400493 and 21833340400502.

It is not an unprimeable number, because it can be changed into a prime (21833340490537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22416160089 + ... + 22416161062.

It is an arithmetic number, because the mean of its divisors is an integer number (5469543180544).

Almost surely, 2^{21833340400537} is an apocalyptic number.

It is an amenable number.

21833340400537 is a deficient number, since it is larger than the sum of its proper divisors (44832321639).

21833340400537 is an equidigital number, since it uses as much as digits as its factorization.

21833340400537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44832321638.

The product of its (nonzero) digits is 725760, while the sum is 43.

The spelling of 21833340400537 in words is "twenty-one trillion, eight hundred thirty-three billion, three hundred forty million, four hundred thousand, five hundred thirty-seven".