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23180530 = 252838191
BaseRepresentation
bin101100001101…
…1010011110010
31121121200201011
41120123103302
521413234110
62144501134
7401013502
oct130332362
947550634
1023180530
11120a296a
12791a7aa
134a57cb9
143115a02
15207d48a
hex161b4f2

23180530 has 16 divisors (see below), whose sum is σ = 41877504. Its totient is φ = 9238320.

The previous prime is 23180519. The next prime is 23180543. The reversal of 23180530 is 3508132.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1266 + ... + 6925.

It is an arithmetic number, because the mean of its divisors is an integer number (2617344).

Almost surely, 223180530 is an apocalyptic number.

23180530 is a deficient number, since it is larger than the sum of its proper divisors (18696974).

23180530 is a wasteful number, since it uses less digits than its factorization.

23180530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8481.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 23180530 is about 4814.6162879299. The cubic root of 23180530 is about 285.1288224436.

Adding to 23180530 its reverse (3508132), we get a palindrome (26688662).

The spelling of 23180530 in words is "twenty-three million, one hundred eighty thousand, five hundred thirty".

Divisors: 1 2 5 10 283 566 1415 2830 8191 16382 40955 81910 2318053 4636106 11590265 23180530