21114248 has 16 divisors (see below), whose sum is σ = 39690000. Its totient is φ = 10530256.

The previous prime is 21114241. The next prime is 21114257. The reversal of 21114248 is 84241112.

It is a super-2 number, since 2×21114248² = 891622937211008, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (21114241) 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, 203 + ... + 6501.

It is an arithmetic number, because the mean of its divisors is an integer number (2480625).

Almost surely, 2^21114248 is an apocalyptic number.

It is an amenable number.

21114248 is a deficient number, since it is larger than the sum of its proper divisors (18575752).

21114248 is a wasteful number, since it uses less digits than its factorization.

21114248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6724 (or 6720 counting only the distinct ones).

The product of its digits is 512, while the sum is 23.

The square root of 21114248 is about 4595.0242654419. The cubic root of 21114248 is about 276.3918330114.

The spelling of 21114248 in words is "twenty-one million, one hundred fourteen thousand, two hundred forty-eight".