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20465743 = 59346877
BaseRepresentation
bin100111000010…
…0100001001111
31102111202201111
41032010201033
520214400433
62010352451
7335645614
oct116044117
942452644
1020465743
1110609241
126a2b727
13431740c
142a0a50b
151be3dcd
hex138484f

20465743 has 4 divisors (see below), whose sum is σ = 20812680. Its totient is φ = 20118808.

The previous prime is 20465729. The next prime is 20465749. The reversal of 20465743 is 34756402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34756402 = 217378201.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-20465743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20465749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173380 + ... + 173497.

It is an arithmetic number, because the mean of its divisors is an integer number (5203170).

Almost surely, 220465743 is an apocalyptic number.

20465743 is a deficient number, since it is larger than the sum of its proper divisors (346937).

20465743 is an equidigital number, since it uses as much as digits as its factorization.

20465743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346936.

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 20465743 is about 4523.9079345186. The cubic root of 20465743 is about 273.5326494204.

The spelling of 20465743 in words is "twenty million, four hundred sixty-five thousand, seven hundred forty-three".

Divisors: 1 59 346877 20465743