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19193899554 = 2323728819669
BaseRepresentation
bin10001111000000010…
…111010101000100010
31211112122201010022200
4101320002322220202
5303302114241204
612452331514030
71246433311554
oct217002725042
954478633280
1019193899554
11815a501905
123877bb8916
131a6b69a11b
14d0120d4d4
157750db539
hex4780baa22

19193899554 has 24 divisors (see below), whose sum is σ = 42710750940. Its totient is φ = 6225048288.

The previous prime is 19193899547. The next prime is 19193899559. The reversal of 19193899554 is 45599839191.

19193899554 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 19175879529 + 18020025 = 138477^2 + 4245^2 .

It is a junction number, because it is equal to n+sod(n) for n = 19193899491 and 19193899500.

It is not an unprimeable number, because it can be changed into a prime (19193899559) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14409169 + ... + 14410500.

Almost surely, 219193899554 is an apocalyptic number.

19193899554 is an abundant number, since it is smaller than the sum of its proper divisors (23516851386).

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

19193899554 is a wasteful number, since it uses less digits than its factorization.

19193899554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28819714 (or 28819711 counting only the distinct ones).

The product of its digits is 15746400, while the sum is 63.

The spelling of 19193899554 in words is "nineteen billion, one hundred ninety-three million, eight hundred ninety-nine thousand, five hundred fifty-four".

Divisors: 1 2 3 6 9 18 37 74 111 222 333 666 28819669 57639338 86459007 172918014 259377021 518754042 1066327753 2132655506 3198983259 6397966518 9596949777 19193899554