21833340400187 has 8 divisors (see below), whose sum is σ = 22587240255600. Its totient is φ = 21079508948064.

The previous prime is 21833340400127. The next prime is 21833340400199. The reversal of 21833340400187 is 78100404333812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21833340400187 - 2⁸ = 21833340399931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21833340400127) 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 7 ways as a sum of consecutive naturals, for example, 16451012 + ... + 17728577.

It is an arithmetic number, because the mean of its divisors is an integer number (2823405031950).

Almost surely, 2^{21833340400187} is an apocalyptic number.

21833340400187 is a deficient number, since it is larger than the sum of its proper divisors (753899855413).

21833340400187 is a wasteful number, since it uses less digits than its factorization.

21833340400187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34201645.

The product of its (nonzero) digits is 387072, while the sum is 44.

Adding to 21833340400187 its reverse (78100404333812), we get a palindrome (99933744733999).

The spelling of 21833340400187 in words is "twenty-one trillion, eight hundred thirty-three billion, three hundred forty million, four hundred thousand, one hundred eighty-seven".