21936450336 has 24 divisors (see below), whose sum is σ = 57583182384. Its totient is φ = 7312150080.

The previous prime is 21936450257. The next prime is 21936450359. The reversal of 21936450336 is 63305463912.

It is a happy number.

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

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114252250 + ... + 114252441.

It is an arithmetic number, because the mean of its divisors is an integer number (2399299266).

Almost surely, 2^21936450336 is an apocalyptic number.

It is an amenable number.

21936450336 is an abundant number, since it is smaller than the sum of its proper divisors (35646732048).

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

21936450336 is a wasteful number, since it uses less digits than its factorization.

21936450336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228504704 (or 228504696 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 42.

The spelling of 21936450336 in words is "twenty-one billion, nine hundred thirty-six million, four hundred fifty thousand, three hundred thirty-six".