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20805314 = 217611921
BaseRepresentation
bin100111101011…
…1011011000010
31110011000112012
41033113123002
520311232224
62021532522
7341561615
oct117273302
943130465
1020805314
1110820382
126b74142
134405b4a
142a9817c
151c5e80e
hex13d76c2

20805314 has 8 divisors (see below), whose sum is σ = 33043788. Its totient is φ = 9790720.

The previous prime is 20805307. The next prime is 20805329. The reversal of 20805314 is 41350802.

20805314 = T1556 + T1557 + ... + T1572.

It can be written as a sum of positive squares in 2 ways, for example, as 20025625 + 779689 = 4475^2 + 883^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×208053142 = 865722181277192, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20805314.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 305927 + ... + 305994.

Almost surely, 220805314 is an apocalyptic number.

20805314 is a deficient number, since it is larger than the sum of its proper divisors (12238474).

20805314 is a wasteful number, since it uses less digits than its factorization.

20805314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611940.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 20805314 is about 4561.2842489808. The cubic root of 20805314 is about 275.0371916641.

The spelling of 20805314 in words is "twenty million, eight hundred five thousand, three hundred fourteen".

Divisors: 1 2 17 34 611921 1223842 10402657 20805314