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18195840000 = 210375413
BaseRepresentation
bin10000111100100011…
…100111110000000000
31201222002200110000000
4100330203213300000
5244231113340000
612205320000000
71212624042132
oct207443476000
951862613000
1018195840000
1177980939a8
123639900000
13193c98c240
14c48849052
15717690000
hex43c8e7c00

18195840000 has 880 divisors, whose sum is σ = 73412625440. Its totient is φ = 4478976000.

The previous prime is 18195839951. The next prime is 18195840007. The reversal of 18195840000 is 4859181.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18195840007) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1399679994 + ... + 1399680006.

It is an arithmetic number, because the mean of its divisors is an integer number (83423438).

Almost surely, 218195840000 is an apocalyptic number.

18195840000 is a gapful number since it is divisible by the number (10) 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 18195840000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36706312720).

18195840000 is an abundant number, since it is smaller than the sum of its proper divisors (55216785440).

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

18195840000 is an frugal number, since it uses more digits than its factorization.

18195840000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74 (or 23 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The spelling of 18195840000 in words is "eighteen billion, one hundred ninety-five million, eight hundred forty thousand".