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20082839 = 72868977
BaseRepresentation
bin100110010011…
…1000010010111
31101210022110212
41030213002113
520120122324
61554240035
7332462360
oct114470227
941708425
1020082839
1110377597
12688601b
13421204a
14294ab67
151b6a70e
hex1327097

20082839 has 4 divisors (see below), whose sum is σ = 22951824. Its totient is φ = 17213856.

The previous prime is 20082817. The next prime is 20082851. The reversal of 20082839 is 93828002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93828002 = 246914001.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-20082839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20082809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1434482 + ... + 1434495.

It is an arithmetic number, because the mean of its divisors is an integer number (5737956).

Almost surely, 220082839 is an apocalyptic number.

20082839 is a deficient number, since it is larger than the sum of its proper divisors (2868985).

20082839 is an equidigital number, since it uses as much as digits as its factorization.

20082839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2868984.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 20082839 is about 4481.3880662134. The cubic root of 20082839 is about 271.8160114943.

The spelling of 20082839 in words is "twenty million, eighty-two thousand, eight hundred thirty-nine".

Divisors: 1 7 2868977 20082839