21322448318 has 8 divisors (see below), whose sum is σ = 33667023720. Its totient is φ = 10100107080.

The previous prime is 21322448267. The next prime is 21322448321. The reversal of 21322448318 is 81384422312.

It is a happy number.

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

It is a Harshad number since it is a multiple of its sum of digits (38), and also a Moran number because the ratio is a prime number: 561117061 = 21322448318 / (2 + 1 + 3 + 2 + 2 + 4 + 4 + 8 + 3 + 1 + 8).

It is a congruent number.

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, 280558493 + ... + 280558568.

It is an arithmetic number, because the mean of its divisors is an integer number (4208377965).

Almost surely, 2^21322448318 is an apocalyptic number.

21322448318 is a deficient number, since it is larger than the sum of its proper divisors (12344575402).

21322448318 is a wasteful number, since it uses less digits than its factorization.

21322448318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561117082.

The product of its digits is 73728, while the sum is 38.

The spelling of 21322448318 in words is "twenty-one billion, three hundred twenty-two million, four hundred forty-eight thousand, three hundred eighteen".