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18315011 = 1113211607
BaseRepresentation
bin100010111011…
…1011100000011
31021110111110202
41011313130003
514142040021
61452315415
7311450351
oct105673403
937414422
1018315011
11a37a380
126172b6b
133a434b0
14260a7d1
15191ba0b
hex1177703

18315011 has 16 divisors (see below), whose sum is σ = 21654528. Its totient is φ = 15271200.

The previous prime is 18314999. The next prime is 18315013. The reversal of 18315011 is 11051381.

It is a cyclic number.

It is not a de Polignac number, because 18315011 - 210 = 18313987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18315013) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 29870 + ... + 30476.

It is an arithmetic number, because the mean of its divisors is an integer number (1353408).

Almost surely, 218315011 is an apocalyptic number.

18315011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

18315011 is a deficient number, since it is larger than the sum of its proper divisors (3339517).

18315011 is a wasteful number, since it uses less digits than its factorization.

18315011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842.

The product of its (nonzero) digits is 120, while the sum is 20.

The square root of 18315011 is about 4279.6040704719. The cubic root of 18315011 is about 263.5941259073.

Adding to 18315011 its reverse (11051381), we get a palindrome (29366392).

The spelling of 18315011 in words is "eighteen million, three hundred fifteen thousand, eleven".

Divisors: 1 11 13 143 211 607 2321 2743 6677 7891 30173 86801 128077 1408847 1665001 18315011