21441349 has 4 divisors (see below), whose sum is σ = 21478464. Its totient is φ = 21404236.

The previous prime is 21441347. The next prime is 21441373. The reversal of 21441349 is 94314412.

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 a cyclic number.

It is not a de Polignac number, because 21441349 - 2¹ = 21441347 is a prime.

It is a super-3 number, since 3×21441349³ (a number of 23 digits) contains 333 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 (21441347) 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, 17677 + ... + 18850.

It is an arithmetic number, because the mean of its divisors is an integer number (5369616).

Almost surely, 2^21441349 is an apocalyptic number.

It is an amenable number.

21441349 is a deficient number, since it is larger than the sum of its proper divisors (37115).

21441349 is an equidigital number, since it uses as much as digits as its factorization.

21441349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37114.

The product of its digits is 3456, while the sum is 28.

The square root of 21441349 is about 4630.4804286380. The cubic root of 21441349 is about 277.8118086958.

The spelling of 21441349 in words is "twenty-one million, four hundred forty-one thousand, three hundred forty-nine".