20300491 has 2 divisors, whose sum is σ = 20300492. Its totient is φ = 20300490.

The previous prime is 20300479. The next prime is 20300507. The reversal of 20300491 is 19400302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20300491 - 2⁵ = 20300459 is a prime.

It is not a weakly prime, because it can be changed into another prime (20300411) 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, 10150245 + 10150246.

It is an arithmetic number, because the mean of its divisors is an integer number (10150246).

Almost surely, 2^20300491 is an apocalyptic number.

20300491 is a deficient number, since it is larger than the sum of its proper divisors (1).

20300491 is an equidigital number, since it uses as much as digits as its factorization.

20300491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 20300491 is about 4505.6066184255. The cubic root of 20300491 is about 272.7944397565.

Adding to 20300491 its reverse (19400302), we get a palindrome (39700793).

The spelling of 20300491 in words is "twenty million, three hundred thousand, four hundred ninety-one".