18000197229672 has 192 divisors, whose sum is σ = 56786694831360. Its totient is φ = 5044048588800.

The previous prime is 18000197229671. The next prime is 18000197229673. The reversal of 18000197229672 is 27692279100081.

It is an interprime number because it is at equal distance from previous prime (18000197229671) and next prime (18000197229673).

It is not an unprimeable number, because it can be changed into a prime (18000197229671) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 74432472 + ... + 74673912.

It is an arithmetic number, because the mean of its divisors is an integer number (295764035580).

Almost surely, 2^{18000197229672} is an apocalyptic number.

18000197229672 is a gapful number since it is divisible by the number (12) 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 18000197229672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28393347415680).

18000197229672 is an abundant number, since it is smaller than the sum of its proper divisors (38786497601688).

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

18000197229672 is a wasteful number, since it uses less digits than its factorization.

18000197229672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244304 (or 244297 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 54.

The spelling of 18000197229672 in words is "eighteen trillion, one hundred ninety-seven million, two hundred twenty-nine thousand, six hundred seventy-two".