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20795924909 is a prime number
BaseRepresentation
bin10011010111100010…
…001010000110101101
31222200022012102222002
4103113202022012231
5320042224044114
613315320502045
71334225305454
oct232742120655
958608172862
1020795924909
118901837201
12404461a925
131c65561a16
141013cadb9b
1581aa8a7de
hex4d788a1ad

20795924909 has 2 divisors, whose sum is σ = 20795924910. Its totient is φ = 20795924908.

The previous prime is 20795924893. The next prime is 20795924939. The reversal of 20795924909 is 90942959702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19600840009 + 1195084900 = 140003^2 + 34570^2 .

It is a cyclic number.

It is not a de Polignac number, because 20795924909 - 24 = 20795924893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20795924939) by changing a digit.

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 as a sum of consecutive naturals, namely, 10397962454 + 10397962455.

It is an arithmetic number, because the mean of its divisors is an integer number (10397962455).

Almost surely, 220795924909 is an apocalyptic number.

It is an amenable number.

20795924909 is a deficient number, since it is larger than the sum of its proper divisors (1).

20795924909 is an equidigital number, since it uses as much as digits as its factorization.

20795924909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3674160, while the sum is 56.

The spelling of 20795924909 in words is "twenty billion, seven hundred ninety-five million, nine hundred twenty-four thousand, nine hundred nine".