21422298 has 8 divisors (see below), whose sum is σ = 42844608. Its totient is φ = 7140764.

The previous prime is 21422273. The next prime is 21422321. The reversal of 21422298 is 89222412.

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

21422298 is an admirable number.

It is a Curzon number.

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, 1785186 + ... + 1785197.

It is an arithmetic number, because the mean of its divisors is an integer number (5355576).

Almost surely, 2^21422298 is an apocalyptic number.

21422298 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21422298 is a wasteful number, since it uses less digits than its factorization.

21422298 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3570388.

The product of its digits is 4608, while the sum is 30.

The square root of 21422298 is about 4628.4228415304. The cubic root of 21422298 is about 277.7295041564.

The spelling of 21422298 in words is "twenty-one million, four hundred twenty-two thousand, two hundred ninety-eight".