21898283 has 4 divisors (see below), whose sum is σ = 23889048. Its totient is φ = 19907520.

The previous prime is 21898271. The next prime is 21898301. The reversal of 21898283 is 38289812.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21898283 - 2⁴ = 21898267 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21898283.

It is not an unprimeable number, because it can be changed into a prime (21898243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 995366 + ... + 995387.

It is an arithmetic number, because the mean of its divisors is an integer number (5972262).

Almost surely, 2^21898283 is an apocalyptic number.

21898283 is a deficient number, since it is larger than the sum of its proper divisors (1990765).

21898283 is a wasteful number, since it uses less digits than its factorization.

21898283 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1990764.

The product of its digits is 55296, while the sum is 41.

The square root of 21898283 is about 4679.5601289010. The cubic root of 21898283 is about 279.7714248503.

The spelling of 21898283 in words is "twenty-one million, eight hundred ninety-eight thousand, two hundred eighty-three".