20063291 has 4 divisors (see below), whose sum is σ = 20935632. Its totient is φ = 19190952.

The previous prime is 20063279. The next prime is 20063299. The reversal of 20063291 is 19236002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19236002 = 2 ⋅9618001.

It is a cyclic number.

It is not a de Polignac number, because 20063291 - 2²² = 15868987 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 872317 = 20063291 / (2 + 0 + 0 + 6 + 3 + 2 + 9 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20063299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 436136 + ... + 436181.

It is an arithmetic number, because the mean of its divisors is an integer number (5233908).

Almost surely, 2^20063291 is an apocalyptic number.

20063291 is a deficient number, since it is larger than the sum of its proper divisors (872341).

20063291 is an equidigital number, since it uses as much as digits as its factorization.

20063291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 872340.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 20063291 is about 4479.2065145514. The cubic root of 20063291 is about 271.7277904961.

Adding to 20063291 its reverse (19236002), we get a palindrome (39299293).

The spelling of 20063291 in words is "twenty million, sixty-three thousand, two hundred ninety-one".