21814246 has 8 divisors (see below), whose sum is σ = 32866200. Its totient is φ = 10858848.

The previous prime is 21814241. The next prime is 21814249. The reversal of 21814246 is 64241812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21814246² = 951722657097032, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21814241) 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, 23571 + ... + 24478.

It is an arithmetic number, because the mean of its divisors is an integer number (4108275).

Almost surely, 2^21814246 is an apocalyptic number.

21814246 is a deficient number, since it is larger than the sum of its proper divisors (11051954).

21814246 is a wasteful number, since it uses less digits than its factorization.

21814246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48278.

The product of its digits is 3072, while the sum is 28.

The square root of 21814246 is about 4670.5723418014. The cubic root of 21814246 is about 279.4130818236.

The spelling of 21814246 in words is "twenty-one million, eight hundred fourteen thousand, two hundred forty-six".