20645483 has 2 divisors, whose sum is σ = 20645484. Its totient is φ = 20645482.

The previous prime is 20645453. The next prime is 20645539. The reversal of 20645483 is 38454602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20645483 - 2¹⁶ = 20579947 is a prime.

It is equal to p_1308884 and since 20645483 and 1308884 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (20645413) 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, 10322741 + 10322742.

It is an arithmetic number, because the mean of its divisors is an integer number (10322742).

Almost surely, 2^20645483 is an apocalyptic number.

20645483 is a deficient number, since it is larger than the sum of its proper divisors (1).

20645483 is an equidigital number, since it uses as much as digits as its factorization.

20645483 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 20645483 is about 4543.7300756097. The cubic root of 20645483 is about 274.3310816600.

The spelling of 20645483 in words is "twenty million, six hundred forty-five thousand, four hundred eighty-three".