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18901305068 = 22139272912457
BaseRepresentation
bin10001100110100110…
…110000011011101100
31210210021010210010212
4101212212300123230
5302202213230233
612403320321552
71236251304452
oct214646603354
953707123125
1018901305068
11801a326288
1237b60132b8
131a22b92ca9
14cb44069d2
15759591a48
hex4669b06ec

18901305068 has 24 divisors (see below), whose sum is σ = 33330133200. Its totient is φ = 9378471168.

The previous prime is 18901305011. The next prime is 18901305097. The reversal of 18901305068 is 86050310981.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1511096 + ... + 1523552.

It is an arithmetic number, because the mean of its divisors is an integer number (1388755550).

Almost surely, 218901305068 is an apocalyptic number.

It is an amenable number.

18901305068 is a deficient number, since it is larger than the sum of its proper divisors (14428828132).

18901305068 is a wasteful number, since it uses less digits than its factorization.

18901305068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15329 (or 15327 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 41.

The spelling of 18901305068 in words is "eighteen billion, nine hundred one million, three hundred five thousand, sixty-eight".

Divisors: 1 2 4 139 278 556 2729 5458 10916 12457 24914 49828 379331 758662 1517324 1731523 3463046 6926092 33995153 67990306 135980612 4725326267 9450652534 18901305068