21114943 has 4 divisors (see below), whose sum is σ = 22033008. Its totient is φ = 20196880.

The previous prime is 21114941. The next prime is 21114971. The reversal of 21114943 is 34941112.

It is a happy number.

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 21114943 - 2¹ = 21114941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21114941) 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, 458998 + ... + 459043.

It is an arithmetic number, because the mean of its divisors is an integer number (5508252).

Almost surely, 2^21114943 is an apocalyptic number.

21114943 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21114943 is a deficient number, since it is larger than the sum of its proper divisors (918065).

21114943 is an equidigital number, since it uses as much as digits as its factorization.

21114943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 918064.

The product of its digits is 864, while the sum is 25.

The square root of 21114943 is about 4595.0998901003. The cubic root of 21114943 is about 276.3948655642.

The spelling of 21114943 in words is "twenty-one million, one hundred fourteen thousand, nine hundred forty-three".