21040183 has 2 divisors, whose sum is σ = 21040184. Its totient is φ = 21040182.

The previous prime is 21040177. The next prime is 21040199. The reversal of 21040183 is 38104012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21040183 - 2⁹ = 21039671 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21040183.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21047183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10520091 + 10520092.

It is an arithmetic number, because the mean of its divisors is an integer number (10520092).

Almost surely, 2^21040183 is an apocalyptic number.

21040183 is a deficient number, since it is larger than the sum of its proper divisors (1).

21040183 is an equidigital number, since it uses as much as digits as its factorization.

21040183 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 21040183 is about 4586.9579243765. The cubic root of 21040183 is about 276.0682767091.

Adding to 21040183 its reverse (38104012), we get a palindrome (59144195).

The spelling of 21040183 in words is "twenty-one million, forty thousand, one hundred eighty-three".