21084298 has 8 divisors (see below), whose sum is σ = 32059908. Its totient is φ = 10397664.

The previous prime is 21084289. The next prime is 21084311. The reversal of 21084298 is 89248012.

It can be written as a sum of positive squares in 2 ways, for example, as 19651489 + 1432809 = 4433^2 + 1197^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72061 + ... + 72352.

Almost surely, 2^21084298 is an apocalyptic number.

21084298 is a deficient number, since it is larger than the sum of its proper divisors (10975610).

21084298 is a wasteful number, since it uses less digits than its factorization.

21084298 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144488.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 21084298 is about 4591.7641489955. The cubic root of 21084298 is about 276.2610863469.

The spelling of 21084298 in words is "twenty-one million, eighty-four thousand, two hundred ninety-eight".