21114433 has 4 divisors (see below), whose sum is σ = 21142660. Its totient is φ = 21086208.

The previous prime is 21114427. The next prime is 21114439. The reversal of 21114433 is 33441112.

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

It is an interprime number because it is at equal distance from previous prime (21114427) and next prime (21114439).

It can be written as a sum of positive squares in 2 ways, for example, as 3908529 + 17205904 = 1977^2 + 4148^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21114433 is a prime.

It is a super-2 number, since 2×21114433² = 891638561822978, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21114433.

It is not an unprimeable number, because it can be changed into a prime (21114439) 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, 12960 + ... + 14497.

It is an arithmetic number, because the mean of its divisors is an integer number (5285665).

Almost surely, 2^21114433 is an apocalyptic number.

It is an amenable number.

21114433 is a deficient number, since it is larger than the sum of its proper divisors (28227).

21114433 is an equidigital number, since it uses as much as digits as its factorization.

21114433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28226.

The product of its digits is 288, while the sum is 19.

The square root of 21114433 is about 4595.0443958682. The cubic root of 21114433 is about 276.3926402442.

Adding to 21114433 its reverse (33441112), we get a palindrome (54555545).

The spelling of 21114433 in words is "twenty-one million, one hundred fourteen thousand, four hundred thirty-three".