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20300893 = 151134443
BaseRepresentation
bin100110101110…
…0010001011101
31102012101120221
41031130101131
520144112033
62003041341
7334361164
oct115342135
942171527
1020300893
11105063a8
126970251
13428a382
1429a63db
151bb012d
hex135c45d

20300893 has 4 divisors (see below), whose sum is σ = 20435488. Its totient is φ = 20166300.

The previous prime is 20300879. The next prime is 20300947. The reversal of 20300893 is 39800302.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-20300893 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 (20300593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67071 + ... + 67372.

It is an arithmetic number, because the mean of its divisors is an integer number (5108872).

Almost surely, 220300893 is an apocalyptic number.

It is an amenable number.

20300893 is a deficient number, since it is larger than the sum of its proper divisors (134595).

20300893 is a wasteful number, since it uses less digits than its factorization.

20300893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134594.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 20300893 is about 4505.6512292897. The cubic root of 20300893 is about 272.7962404131.

The spelling of 20300893 in words is "twenty million, three hundred thousand, eight hundred ninety-three".

Divisors: 1 151 134443 20300893