21822993888 has 24 divisors (see below), whose sum is σ = 57285359208. Its totient is φ = 7274331264.

The previous prime is 21822993847. The next prime is 21822993889. The reversal of 21822993888 is 88839922812.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21822993889) 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, 113661331 + ... + 113661522.

It is an arithmetic number, because the mean of its divisors is an integer number (2386889967).

Almost surely, 2^21822993888 is an apocalyptic number.

It is an amenable number.

21822993888 is an abundant number, since it is smaller than the sum of its proper divisors (35462365320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21822993888 is a wasteful number, since it uses less digits than its factorization.

21822993888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227322866 (or 227322858 counting only the distinct ones).

The product of its digits is 7962624, while the sum is 60.

The spelling of 21822993888 in words is "twenty-one billion, eight hundred twenty-two million, nine hundred ninety-three thousand, eight hundred eighty-eight".