21792218822 has 48 divisors (see below), whose sum is σ = 36477952560. Its totient is φ = 9755665920.

The previous prime is 21792218807. The next prime is 21792218849. The reversal of 21792218822 is 22881229712.

It is a happy number.

It is a super-3 number, since 3×21792218822³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4454954 + ... + 4459842.

It is an arithmetic number, because the mean of its divisors is an integer number (759957345).

Almost surely, 2^21792218822 is an apocalyptic number.

21792218822 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21792218822 is a deficient number, since it is larger than the sum of its proper divisors (14685733738).

21792218822 is a wasteful number, since it uses less digits than its factorization.

21792218822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5189 (or 5178 counting only the distinct ones).

The product of its digits is 129024, while the sum is 44.

The spelling of 21792218822 in words is "twenty-one billion, seven hundred ninety-two million, two hundred eighteen thousand, eight hundred twenty-two".