Search a number
-
+
20305113 = 323294277
BaseRepresentation
bin100110101110…
…1010011011001
31102012121101020
41031131103121
520144230423
62003113053
7334406403
oct115352331
942177336
1020305113
1110509594
126972789
13428c27a
1429a7b73
151bb14e3
hex135d4d9

20305113 has 8 divisors (see below), whose sum is σ = 28250688. Its totient is φ = 12948144.

The previous prime is 20305097. The next prime is 20305151. The reversal of 20305113 is 31150302.

It is a happy number.

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

It is not a de Polignac number, because 20305113 - 24 = 20305097 is a prime.

It is a super-2 number, since 2×203051132 = 824595227885538, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20305092 and 20305101.

It is not an unprimeable number, because it can be changed into a prime (20305013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147070 + ... + 147207.

It is an arithmetic number, because the mean of its divisors is an integer number (3531336).

Almost surely, 220305113 is an apocalyptic number.

20305113 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20305113 is a deficient number, since it is larger than the sum of its proper divisors (7945575).

20305113 is a wasteful number, since it uses less digits than its factorization.

20305113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294303.

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 20305113 is about 4506.1195057388. The cubic root of 20305113 is about 272.8151413941.

Adding to 20305113 its reverse (31150302), we get a palindrome (51455415).

The spelling of 20305113 in words is "twenty million, three hundred five thousand, one hundred thirteen".

Divisors: 1 3 23 69 294277 882831 6768371 20305113