21828198345 has 8 divisors (see below), whose sum is σ = 34925117376. Its totient is φ = 11641705776.

The previous prime is 21828198341. The next prime is 21828198349. The reversal of 21828198345 is 54389182812.

It is an interprime number because it is at equal distance from previous prime (21828198341) and next prime (21828198349).

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

It is not a de Polignac number, because 21828198345 - 2² = 21828198341 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21828198341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 727606597 + ... + 727606626.

It is an arithmetic number, because the mean of its divisors is an integer number (4365639672).

Almost surely, 2^21828198345 is an apocalyptic number.

It is an amenable number.

21828198345 is a deficient number, since it is larger than the sum of its proper divisors (13096919031).

21828198345 is a wasteful number, since it uses less digits than its factorization.

21828198345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1455213231.

The product of its digits is 1105920, while the sum is 51.

The spelling of 21828198345 in words is "twenty-one billion, eight hundred twenty-eight million, one hundred ninety-eight thousand, three hundred forty-five".