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19944323568 = 24321317797933
BaseRepresentation
bin10010100100110001…
…100011100111110000
31220110221202121112200
4102210301203213300
5311321221323233
613055020023200
71304144644641
oct224461434760
956427677480
1019944323568
118505061544
123a47391b00
131b5acb28c0
14d72b516c8
157bae1e313
hex4a4c639f0

19944323568 has 240 divisors, whose sum is σ = 64459624320. Its totient is φ = 5701902336.

The previous prime is 19944323521. The next prime is 19944323611. The reversal of 19944323568 is 86532344991.

19944323568 is a `hidden beast` number, since 1 + 9 + 9 + 44 + 32 + 3 + 568 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2510130 + ... + 2518062.

It is an arithmetic number, because the mean of its divisors is an integer number (268581768).

Almost surely, 219944323568 is an apocalyptic number.

19944323568 is a gapful number since it is divisible by the number (18) 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 19944323568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32229812160).

19944323568 is an abundant number, since it is smaller than the sum of its proper divisors (44515300752).

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

19944323568 is a wasteful number, since it uses less digits than its factorization.

19944323568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8056 (or 8047 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 54.

The spelling of 19944323568 in words is "nineteen billion, nine hundred forty-four million, three hundred twenty-three thousand, five hundred sixty-eight".