21083198 has 8 divisors (see below), whose sum is σ = 33289320. Its totient is φ = 9986760.

The previous prime is 21083197. The next prime is 21083233. The reversal of 21083198 is 89138012.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21083191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277373 + ... + 277448.

It is an arithmetic number, because the mean of its divisors is an integer number (4161165).

Almost surely, 2^21083198 is an apocalyptic number.

21083198 is a deficient number, since it is larger than the sum of its proper divisors (12206122).

21083198 is a wasteful number, since it uses less digits than its factorization.

21083198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554842.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 21083198 is about 4591.6443677619. The cubic root of 21083198 is about 276.2562819426.

The spelling of 21083198 in words is "twenty-one million, eighty-three thousand, one hundred ninety-eight".