21414449 has 12 divisors (see below), whose sum is σ = 25588416. Its totient is φ = 17554152.

The previous prime is 21414431. The next prime is 21414457. The reversal of 21414449 is 94441412.

It is not a de Polignac number, because 21414449 - 2⁸ = 21414193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21414409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 812 + ... + 6594.

It is an arithmetic number, because the mean of its divisors is an integer number (2132368).

Almost surely, 2^21414449 is an apocalyptic number.

It is an amenable number.

21414449 is a deficient number, since it is larger than the sum of its proper divisors (4173967).

21414449 is an equidigital number, since it uses as much as digits as its factorization.

21414449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5836 (or 5813 counting only the distinct ones).

The product of its digits is 4608, while the sum is 29.

The square root of 21414449 is about 4627.5748508263. The cubic root of 21414449 is about 277.6955805446.

The spelling of 21414449 in words is "twenty-one million, four hundred fourteen thousand, four hundred forty-nine".