21268119 has 4 divisors (see below), whose sum is σ = 28357496. Its totient is φ = 14178744.

The previous prime is 21268103. The next prime is 21268129. The reversal of 21268119 is 91186212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 21268119 - 2⁴ = 21268103 is a prime.

It is a super-2 number, since 2×21268119² = 904665771596322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21268129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3544684 + ... + 3544689.

It is an arithmetic number, because the mean of its divisors is an integer number (7089374).

Almost surely, 2^21268119 is an apocalyptic number.

21268119 is a deficient number, since it is larger than the sum of its proper divisors (7089377).

21268119 is an equidigital number, since it uses as much as digits as its factorization.

21268119 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7089376.

The product of its digits is 1728, while the sum is 30.

The square root of 21268119 is about 4611.7370913789. The cubic root of 21268119 is about 277.0616144483.

The spelling of 21268119 in words is "twenty-one million, two hundred sixty-eight thousand, one hundred nineteen".