21298298 has 16 divisors (see below), whose sum is σ = 36953280. Its totient is φ = 9017376.

The previous prime is 21298283. The next prime is 21298307. The reversal of 21298298 is 89289212.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8003 + ... + 10326.

It is an arithmetic number, because the mean of its divisors is an integer number (2309580).

Almost surely, 2^21298298 is an apocalyptic number.

21298298 is a deficient number, since it is larger than the sum of its proper divisors (15654982).

21298298 is a wasteful number, since it uses less digits than its factorization.

21298298 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18421.

The product of its digits is 41472, while the sum is 41.

The square root of 21298298 is about 4615.0079089856. The cubic root of 21298298 is about 277.1926006547.

The spelling of 21298298 in words is "twenty-one million, two hundred ninety-eight thousand, two hundred ninety-eight".