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18070479 = 337234157
BaseRepresentation
bin100010011101…
…1101111001111
31021000002001000
41010323233033
514111223404
61443151343
7306411420
oct104735717
937002030
1018070479
11a222689
126075553
1339890bb
142585647
1518be339
hex113bbcf

18070479 has 32 divisors (see below), whose sum is σ = 31933440. Its totient is φ = 9874656.

The previous prime is 18070477. The next prime is 18070483. The reversal of 18070479 is 97407081.

18070479 is a `hidden beast` number, since 180 + 7 + 0 + 479 = 666.

It is not a de Polignac number, because 18070479 - 21 = 18070477 is a prime.

It is a super-2 number, since 2×180704792 = 653084422578882, which contains 22 as substring.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18070477) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2269 + ... + 6425.

It is an arithmetic number, because the mean of its divisors is an integer number (997920).

Almost surely, 218070479 is an apocalyptic number.

18070479 is a deficient number, since it is larger than the sum of its proper divisors (13862961).

18070479 is a wasteful number, since it uses less digits than its factorization.

18070479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4196 (or 4190 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 18070479 is about 4250.9386022383. The cubic root of 18070479 is about 262.4157443876.

The spelling of 18070479 in words is "eighteen million, seventy thousand, four hundred seventy-nine".

Divisors: 1 3 7 9 21 23 27 63 69 161 189 207 483 621 1449 4157 4347 12471 29099 37413 87297 95611 112239 261891 286833 669277 785673 860499 2007831 2581497 6023493 18070479