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20443693 is a prime number
BaseRepresentation
bin100110111111…
…1001000101101
31102110122110211
41031333020231
520213144233
62010102421
7335524414
oct115771055
942418424
1020443693
11105a3716
126a1aa11
13430a37a
142a0247b
151bdc5cd
hex137f22d

20443693 has 2 divisors, whose sum is σ = 20443694. Its totient is φ = 20443692.

The previous prime is 20443691. The next prime is 20443697. The reversal of 20443693 is 39634402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12974404 + 7469289 = 3602^2 + 2733^2 .

It is a cyclic number.

It is not a de Polignac number, because 20443693 - 21 = 20443691 is a prime.

Together with 20443691, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20443691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10221846 + 10221847.

It is an arithmetic number, because the mean of its divisors is an integer number (10221847).

Almost surely, 220443693 is an apocalyptic number.

It is an amenable number.

20443693 is a deficient number, since it is larger than the sum of its proper divisors (1).

20443693 is an equidigital number, since it uses as much as digits as its factorization.

20443693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 20443693 is about 4521.4702254908. The cubic root of 20443693 is about 273.4343784982.

The spelling of 20443693 in words is "twenty million, four hundred forty-three thousand, six hundred ninety-three".