20963031 has 4 divisors (see below), whose sum is σ = 27950712. Its totient is φ = 13975352.

The previous prime is 20963029. The next prime is 20963039. The reversal of 20963031 is 13036902.

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 20963031 - 2¹ = 20963029 is a prime.

It is a super-2 number, since 2×20963031² = 878897337413922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20962992 and 20963010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20963039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3493836 + ... + 3493841.

It is an arithmetic number, because the mean of its divisors is an integer number (6987678).

Almost surely, 2^20963031 is an apocalyptic number.

20963031 is a deficient number, since it is larger than the sum of its proper divisors (6987681).

20963031 is an equidigital number, since it uses as much as digits as its factorization.

20963031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6987680.

The product of its (nonzero) digits is 972, while the sum is 24.

The square root of 20963031 is about 4578.5402695619. The cubic root of 20963031 is about 275.7304262446.

Adding to 20963031 its reverse (13036902), we get a palindrome (33999933).

The spelling of 20963031 in words is "twenty million, nine hundred sixty-three thousand, thirty-one".