21004042183 has 2 divisors, whose sum is σ = 21004042184. Its totient is φ = 21004042182.

The previous prime is 21004042061. The next prime is 21004042187. The reversal of 21004042183 is 38124040012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21004042183 - 2²⁹ = 20467171271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21004042187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10502021091 + 10502021092.

It is an arithmetic number, because the mean of its divisors is an integer number (10502021092).

Almost surely, 2^21004042183 is an apocalyptic number.

21004042183 is a deficient number, since it is larger than the sum of its proper divisors (1).

21004042183 is an equidigital number, since it uses as much as digits as its factorization.

21004042183 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 21004042183 its reverse (38124040012), we get a palindrome (59128082195).

The spelling of 21004042183 in words is "twenty-one billion, four million, forty-two thousand, one hundred eighty-three".