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20892297 = 36964099
BaseRepresentation
bin100111110110…
…0101010001001
31110022102211210
41033230222021
520322023142
62023443333
7342403326
oct117545211
943272753
1020892297
111087a768
126bb6549
13443660a
142abbb4d
151c7a49c
hex13eca89

20892297 has 4 divisors (see below), whose sum is σ = 27856400. Its totient is φ = 13928196.

The previous prime is 20892293. The next prime is 20892331. The reversal of 20892297 is 79229802.

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 not a de Polignac number, because 20892297 - 22 = 20892293 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20892293) 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, 3482047 + ... + 3482052.

It is an arithmetic number, because the mean of its divisors is an integer number (6964100).

Almost surely, 220892297 is an apocalyptic number.

It is an amenable number.

20892297 is a deficient number, since it is larger than the sum of its proper divisors (6964103).

20892297 is an equidigital number, since it uses as much as digits as its factorization.

20892297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6964102.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 20892297 is about 4570.8092281346. The cubic root of 20892297 is about 275.4199512055.

The spelling of 20892297 in words is "twenty million, eight hundred ninety-two thousand, two hundred ninety-seven".

Divisors: 1 3 6964099 20892297