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19799842608 = 24337132174353
BaseRepresentation
bin10010011100001010…
…011001111100110000
31220002212220012221000
4102130022121330300
5311022224430413
613032415202000
71300441612440
oct223412317460
956085805830
1019799842608
118440549897
123a06b16300
131b37096b00
14d5b8a2120
157ad3d0073
hex49c299f30

19799842608 has 960 divisors, whose sum is σ = 77639316480. Its totient is φ = 4709892096.

The previous prime is 19799842589. The next prime is 19799842649. The reversal of 19799842608 is 80624899791.

19799842608 is a `hidden beast` number, since 19 + 7 + 9 + 9 + 8 + 4 + 2 + 608 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 373581910 + ... + 373581962.

It is an arithmetic number, because the mean of its divisors is an integer number (80874288).

Almost surely, 219799842608 is an apocalyptic number.

19799842608 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 19799842608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38819658240).

19799842608 is an abundant number, since it is smaller than the sum of its proper divisors (57839473872).

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

19799842608 is a wasteful number, since it uses less digits than its factorization.

19799842608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163 (or 138 counting only the distinct ones).

The product of its (nonzero) digits is 15676416, while the sum is 63.

The spelling of 19799842608 in words is "nineteen billion, seven hundred ninety-nine million, eight hundred forty-two thousand, six hundred eight".