21344097 has 4 divisors (see below), whose sum is σ = 28458800. Its totient is φ = 14229396.

The previous prime is 21344093. The next prime is 21344117. The reversal of 21344097 is 79044312.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 21344097 - 2² = 21344093 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21344093) by changing a digit.

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, 3557347 + ... + 3557352.

It is an arithmetic number, because the mean of its divisors is an integer number (7114700).

Almost surely, 2^21344097 is an apocalyptic number.

It is an amenable number.

21344097 is a deficient number, since it is larger than the sum of its proper divisors (7114703).

21344097 is an equidigital number, since it uses as much as digits as its factorization.

21344097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7114702.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 21344097 is about 4619.9672076758. The cubic root of 21344097 is about 277.3911463329.

The spelling of 21344097 in words is "twenty-one million, three hundred forty-four thousand, ninety-seven".