21893041 has 3 divisors (see below), whose sum is σ = 21897721. Its totient is φ = 21888362.

The previous prime is 21893009. The next prime is 21893051. The reversal of 21893041 is 14039812.

It is a happy number.

The square root of 21893041 is 4679.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 21893041 - 2⁵ = 21893009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21893051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2340 + ... + 7018.

Almost surely, 2^21893041 is an apocalyptic number.

21893041 is the 4679-th square number.

21893041 is the 2340-th centered octagonal number.

It is an amenable number.

21893041 is a deficient number, since it is larger than the sum of its proper divisors (4680).

21893041 is an frugal number, since it uses more digits than its factorization.

21893041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9358 (or 4679 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The cubic root of 21893041 is about 279.7490992210.

The spelling of 21893041 in words is "twenty-one million, eight hundred ninety-three thousand, forty-one".