21484299 has 4 divisors (see below), whose sum is σ = 28645736. Its totient is φ = 14322864.

The previous prime is 21484291. The next prime is 21484303. The reversal of 21484299 is 99248412.

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

It is not a de Polignac number, because 21484299 - 2³ = 21484291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21484291) 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, 3580714 + ... + 3580719.

It is an arithmetic number, because the mean of its divisors is an integer number (7161434).

Almost surely, 2^21484299 is an apocalyptic number.

21484299 is a deficient number, since it is larger than the sum of its proper divisors (7161437).

21484299 is an equidigital number, since it uses as much as digits as its factorization.

21484299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7161436.

The product of its digits is 41472, while the sum is 39.

The square root of 21484299 is about 4635.1158561572. The cubic root of 21484299 is about 277.9971835196.

The spelling of 21484299 in words is "twenty-one million, four hundred eighty-four thousand, two hundred ninety-nine".