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18207068 = 221117101241
BaseRepresentation
bin100010101110…
…1000101011100
31021021000101212
41011131011130
514130111233
61450123552
7310520555
oct105350534
937230355
1018207068
11a306270
1261205b8
133a06319
1425bd32c
1518e9a48
hex115d15c

18207068 has 48 divisors (see below), whose sum is σ = 37322208. Its totient is φ = 7680000.

The previous prime is 18207047. The next prime is 18207089. The reversal of 18207068 is 86070281.

It is an interprime number because it is at equal distance from previous prime (18207047) and next prime (18207089).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75428 + ... + 75668.

It is an arithmetic number, because the mean of its divisors is an integer number (777546).

Almost surely, 218207068 is an apocalyptic number.

It is an amenable number.

18207068 is an abundant number, since it is smaller than the sum of its proper divisors (19115140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18207068 is a wasteful number, since it uses less digits than its factorization.

18207068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374 (or 372 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 18207068 is about 4266.9741035071. The cubic root of 18207068 is about 263.0752578510.

It can be divided in two parts, 1820 and 7068, that added together give a palindrome (8888).

The spelling of 18207068 in words is "eighteen million, two hundred seven thousand, sixty-eight".

Divisors: 1 2 4 11 17 22 34 44 68 101 187 202 241 374 404 482 748 964 1111 1717 2222 2651 3434 4097 4444 5302 6868 8194 10604 16388 18887 24341 37774 45067 48682 75548 90134 97364 180268 267751 413797 535502 827594 1071004 1655188 4551767 9103534 18207068