20380463 has 4 divisors (see below), whose sum is σ = 20422800. Its totient is φ = 20338128.

The previous prime is 20380457. The next prime is 20380471. The reversal of 20380463 is 36408302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20380463 - 2⁸ = 20380207 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 (20380453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20438 + ... + 21411.

It is an arithmetic number, because the mean of its divisors is an integer number (5105700).

Almost surely, 2^20380463 is an apocalyptic number.

20380463 is a deficient number, since it is larger than the sum of its proper divisors (42337).

20380463 is an equidigital number, since it uses as much as digits as its factorization.

20380463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42336.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 20380463 is about 4514.4726159320. The cubic root of 20380463 is about 273.1521869685.

Adding to 20380463 its reverse (36408302), we get a palindrome (56788765).

The spelling of 20380463 in words is "twenty million, three hundred eighty thousand, four hundred sixty-three".