18023668416 has 168 divisors, whose sum is σ = 56178114720. Its totient is φ = 5491666944.

The previous prime is 18023668409. The next prime is 18023668427. The reversal of 18023668416 is 61486632081.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 759580 + ... + 782948.

It is an arithmetic number, because the mean of its divisors is an integer number (334393540).

Almost surely, 2^18023668416 is an apocalyptic number.

18023668416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18023668416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28089057360).

18023668416 is an abundant number, since it is smaller than the sum of its proper divisors (38154446304).

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

18023668416 is a wasteful number, since it uses less digits than its factorization.

18023668416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23503 (or 23490 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The spelling of 18023668416 in words is "eighteen billion, twenty-three million, six hundred sixty-eight thousand, four hundred sixteen".