Search a number
-
+
19908807072 = 25371159191239
BaseRepresentation
bin10010100010101010…
…000100100110100000
31220101110221012001220
4102202222010212200
5311233123311242
613051310455040
71303234032210
oct224252044640
956343835056
1019908807072
118497003470
123a37504480
131b53828a1b
14d6c148240
157b7c55bec
hex4a2a849a0

19908807072 has 384 divisors, whose sum is σ = 66886041600. Its totient is φ = 5035699200.

The previous prime is 19908807053. The next prime is 19908807089. The reversal of 19908807072 is 27070880991.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 83300329 + ... + 83300567.

It is an arithmetic number, because the mean of its divisors is an integer number (174182400).

Almost surely, 219908807072 is an apocalyptic number.

19908807072 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 19908807072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33443020800).

19908807072 is an abundant number, since it is smaller than the sum of its proper divisors (46977234528).

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

19908807072 is a wasteful number, since it uses less digits than its factorization.

19908807072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520 (or 512 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 51.

The spelling of 19908807072 in words is "nineteen billion, nine hundred eight million, eight hundred seven thousand, seventy-two".