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20849291999 is a prime number
BaseRepresentation
bin10011011010101101…
…101111001011011111
31222211000121202211222
4103122231233023133
5320144404320444
613324504403555
71335444025604
oct233255571337
958730552758
1020849291999
118929977738
12405a4765bb
131c73628893
14101b0026ab
158205cceee
hex4dab6f2df

20849291999 has 2 divisors, whose sum is σ = 20849292000. Its totient is φ = 20849291998.

The previous prime is 20849291993. The next prime is 20849292007. The reversal of 20849291999 is 99919294802.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-20849291999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20849291993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10424645999 + 10424646000.

It is an arithmetic number, because the mean of its divisors is an integer number (10424646000).

Almost surely, 220849291999 is an apocalyptic number.

20849291999 is a deficient number, since it is larger than the sum of its proper divisors (1).

20849291999 is an equidigital number, since it uses as much as digits as its factorization.

20849291999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7558272, while the sum is 62.

The spelling of 20849291999 in words is "twenty billion, eight hundred forty-nine million, two hundred ninety-one thousand, nine hundred ninety-nine".