18206822656 has 288 divisors, whose sum is σ = 45466081920. Its totient is φ = 7166361600.

The previous prime is 18206822653. The next prime is 18206822677. The reversal of 18206822656 is 65622860281.

It is not an unprimeable number, because it can be changed into a prime (18206822653) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33653746 + ... + 33654286.

It is an arithmetic number, because the mean of its divisors is an integer number (157868340).

Almost surely, 2^18206822656 is an apocalyptic number.

18206822656 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 18206822656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22733040960).

18206822656 is an abundant number, since it is smaller than the sum of its proper divisors (27259259264).

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

18206822656 is a wasteful number, since it uses less digits than its factorization.

18206822656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641 (or 627 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 46.

The spelling of 18206822656 in words is "eighteen billion, two hundred six million, eight hundred twenty-two thousand, six hundred fifty-six".