20963833 has 32 divisors (see below), whose sum is σ = 25546752. Its totient is φ = 17001600.

The previous prime is 20963807. The next prime is 20963837. The reversal of 20963833 is 33836902.

It is a de Polignac number, because none of the positive numbers 2^k-20963833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20963837) 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 31 ways as a sum of consecutive naturals, for example, 446016 + ... + 446062.

It is an arithmetic number, because the mean of its divisors is an integer number (798336).

Almost surely, 2^20963833 is an apocalyptic number.

20963833 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20963833 is a deficient number, since it is larger than the sum of its proper divisors (4582919).

20963833 is a wasteful number, since it uses less digits than its factorization.

20963833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165.

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 20963833 is about 4578.6278512236. The cubic root of 20963833 is about 275.7339424820.

It can be divided in two parts, 2096 and 3833, that added together give a square (5929 = 77²).

The spelling of 20963833 in words is "twenty million, nine hundred sixty-three thousand, eight hundred thirty-three".