21748214 has 8 divisors (see below), whose sum is σ = 32653368. Its totient is φ = 10863760.

The previous prime is 21748201. The next prime is 21748261. The reversal of 21748214 is 41284712.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2207 + ... + 6954.

It is an arithmetic number, because the mean of its divisors is an integer number (4081671).

Almost surely, 2^21748214 is an apocalyptic number.

21748214 is a deficient number, since it is larger than the sum of its proper divisors (10905154).

21748214 is a wasteful number, since it uses less digits than its factorization.

21748214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10350.

The product of its digits is 3584, while the sum is 29.

The square root of 21748214 is about 4663.4980433147. The cubic root of 21748214 is about 279.1308678929.

The spelling of 21748214 in words is "twenty-one million, seven hundred forty-eight thousand, two hundred fourteen".