20063831 has 4 divisors (see below), whose sum is σ = 20338752. Its totient is φ = 19788912.

The previous prime is 20063809. The next prime is 20063899. The reversal of 20063831 is 13836002.

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 20063831 - 2⁶ = 20063767 is a prime.

It is a super-2 number, since 2×20063831² = 805114628793122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20063797 and 20063806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20069831) 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, 137351 + ... + 137496.

It is an arithmetic number, because the mean of its divisors is an integer number (5084688).

Almost surely, 2^20063831 is an apocalyptic number.

20063831 is a deficient number, since it is larger than the sum of its proper divisors (274921).

20063831 is an equidigital number, since it uses as much as digits as its factorization.

20063831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274920.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 20063831 is about 4479.2667926794. The cubic root of 20063831 is about 271.7302283097.

Adding to 20063831 its reverse (13836002), we get a palindrome (33899833).

The spelling of 20063831 in words is "twenty million, sixty-three thousand, eight hundred thirty-one".