21323120183 has 2 divisors, whose sum is σ = 21323120184. Its totient is φ = 21323120182.

The previous prime is 21323120171. The next prime is 21323120237. The reversal of 21323120183 is 38102132312.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21323120183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21323120083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10661560091 + 10661560092.

It is an arithmetic number, because the mean of its divisors is an integer number (10661560092).

Almost surely, 2^21323120183 is an apocalyptic number.

21323120183 is a deficient number, since it is larger than the sum of its proper divisors (1).

21323120183 is an equidigital number, since it uses as much as digits as its factorization.

21323120183 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 21323120183 its reverse (38102132312), we get a palindrome (59425252495).

The spelling of 21323120183 in words is "twenty-one billion, three hundred twenty-three million, one hundred twenty thousand, one hundred eighty-three".