21180083 has 2 divisors, whose sum is σ = 21180084. Its totient is φ = 21180082.

The previous prime is 21180073. The next prime is 21180101. The reversal of 21180083 is 38008112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21180083 - 2⁸ = 21179827 is a prime.

It is not a weakly prime, because it can be changed into another prime (21180043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10590041 + 10590042.

It is an arithmetic number, because the mean of its divisors is an integer number (10590042).

Almost surely, 2^21180083 is an apocalyptic number.

21180083 is a deficient number, since it is larger than the sum of its proper divisors (1).

21180083 is an equidigital number, since it uses as much as digits as its factorization.

21180083 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 21180083 is about 4602.1824170713. The cubic root of 21180083 is about 276.6788015838.

Adding to 21180083 its reverse (38008112), we get a palindrome (59188195).

The spelling of 21180083 in words is "twenty-one million, one hundred eighty thousand, eighty-three".