20300447 has 4 divisors (see below), whose sum is σ = 20340840. Its totient is φ = 20260056.

The previous prime is 20300419. The next prime is 20300459. The reversal of 20300447 is 74400302.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74400302 = 2 ⋅37200151.

It is a cyclic number.

It is not a de Polignac number, because 20300447 - 2¹⁰ = 20299423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20300477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19433 + ... + 20450.

It is an arithmetic number, because the mean of its divisors is an integer number (5085210).

Almost surely, 2^20300447 is an apocalyptic number.

20300447 is a deficient number, since it is larger than the sum of its proper divisors (40393).

20300447 is an equidigital number, since it uses as much as digits as its factorization.

20300447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40392.

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 20300447 is about 4505.6017356176. The cubic root of 20300447 is about 272.7942426682.

Adding to 20300447 its reverse (74400302), we get a palindrome (94700749).

The spelling of 20300447 in words is "twenty million, three hundred thousand, four hundred forty-seven".