20816083 has 2 divisors, whose sum is σ = 20816084. Its totient is φ = 20816082.

The previous prime is 20816071. The next prime is 20816087. The reversal of 20816083 is 38061802.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20816083 is a prime.

It is a super-2 number, since 2×20816083² = 866618622925778, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20816087) 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, 10408041 + 10408042.

It is an arithmetic number, because the mean of its divisors is an integer number (10408042).

Almost surely, 2^20816083 is an apocalyptic number.

20816083 is a deficient number, since it is larger than the sum of its proper divisors (1).

20816083 is an equidigital number, since it uses as much as digits as its factorization.

20816083 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 20816083 is about 4562.4645752049. The cubic root of 20816083 is about 275.0846373092.

Adding to 20816083 its reverse (38061802), we get a palindrome (58877885).

The spelling of 20816083 in words is "twenty million, eight hundred sixteen thousand, eighty-three".