18216296448 has 224 divisors, whose sum is σ = 56672073600. Its totient is φ = 5202247680.

The previous prime is 18216296393. The next prime is 18216296479. The reversal of 18216296448 is 84469261281.

It is a tau number, because it is divible by the number of its divisors (224).

It is a self number, because there is not a number n which added to its sum of digits gives 18216296448.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8428488 + ... + 8430648.

Almost surely, 2^18216296448 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18216296448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28336036800).

18216296448 is an abundant number, since it is smaller than the sum of its proper divisors (38455777152).

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

18216296448 is an frugal number, since it uses more digits than its factorization.

18216296448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2211 (or 2173 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 51.

The spelling of 18216296448 in words is "eighteen billion, two hundred sixteen million, two hundred ninety-six thousand, four hundred forty-eight".