21114238 has 8 divisors (see below), whose sum is σ = 33534432. Its totient is φ = 9936096.

The previous prime is 21114229. The next prime is 21114241. The reversal of 21114238 is 83241112.

It is a happy number.

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

It is a super-2 number, since 2×21114238² = 891622092641288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 310470 + ... + 310537.

It is an arithmetic number, because the mean of its divisors is an integer number (4191804).

Almost surely, 2^21114238 is an apocalyptic number.

21114238 is a deficient number, since it is larger than the sum of its proper divisors (12420194).

21114238 is a wasteful number, since it uses less digits than its factorization.

21114238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621026.

The product of its digits is 384, while the sum is 22.

The square root of 21114238 is about 4595.0231773082. The cubic root of 21114238 is about 276.3917893770.

The spelling of 21114238 in words is "twenty-one million, one hundred fourteen thousand, two hundred thirty-eight".