18222145536 has 224 divisors, whose sum is σ = 56330258688. Its totient is φ = 5131468800.

The previous prime is 18222145499. The next prime is 18222145549. The reversal of 18222145536 is 63554122281.

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

Its product of digits (115200) is a multiple of the sum of its prime divisors (1536).

It is a junction number, because it is equal to n+sod(n) for n = 18222145494 and 18222145503.

It is a congruent number.

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, 12557611 + ... + 12559061.

Almost surely, 2^18222145536 is an apocalyptic number.

18222145536 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 18222145536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28165129344).

18222145536 is an abundant number, since it is smaller than the sum of its proper divisors (38108113152).

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

18222145536 is an equidigital number, since it uses as much as digits as its factorization.

18222145536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1560 (or 1536 counting only the distinct ones).

The product of its digits is 115200, while the sum is 39.

The spelling of 18222145536 in words is "eighteen billion, two hundred twenty-two million, one hundred forty-five thousand, five hundred thirty-six".