21468943 has 6 divisors (see below), whose sum is σ = 22806416. Its totient is φ = 20205792.

The previous prime is 21468929. The next prime is 21468947. The reversal of 21468943 is 34986412.

It is not a de Polignac number, because 21468943 - 2⁹ = 21468431 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 (21468947) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36855 + ... + 37432.

Almost surely, 2^21468943 is an apocalyptic number.

21468943 is a deficient number, since it is larger than the sum of its proper divisors (1337473).

21468943 is an equidigital number, since it uses as much as digits as its factorization.

21468943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74321 (or 74304 counting only the distinct ones).

The product of its digits is 41472, while the sum is 37.

The square root of 21468943 is about 4633.4590750324. The cubic root of 21468943 is about 277.9309344845.

The spelling of 21468943 in words is "twenty-one million, four hundred sixty-eight thousand, nine hundred forty-three".