21800239366 has 8 divisors (see below), whose sum is σ = 32730445440. Its totient is φ = 10890090888.

The previous prime is 21800239343. The next prime is 21800239367. The reversal of 21800239366 is 66393200812.

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 (21800239367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5011681 + ... + 5016028.

It is an arithmetic number, because the mean of its divisors is an integer number (4091305680).

Almost surely, 2^21800239366 is an apocalyptic number.

21800239366 is a deficient number, since it is larger than the sum of its proper divisors (10930206074).

21800239366 is a wasteful number, since it uses less digits than its factorization.

21800239366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10028798.

The product of its (nonzero) digits is 93312, while the sum is 40.

The spelling of 21800239366 in words is "twenty-one billion, eight hundred million, two hundred thirty-nine thousand, three hundred sixty-six".