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BaseRepresentation
bin100010100110…
…0110101100111
31021010122010002
41011030311213
514120444034
61444451515
7310122545
oct105146547
937118102
1018140519
11a270271
1260a9b9b
1339b1c47
1425a2d95
1518d4e7e
hex114cd67

18140519 has 2 divisors, whose sum is σ = 18140520. Its totient is φ = 18140518.

The previous prime is 18140503. The next prime is 18140527. The reversal of 18140519 is 91504181.

It is a strong prime.

It is an emirp because it is prime and its reverse (91504181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18140519 - 24 = 18140503 is a prime.

It is a super-2 number, since 2×181405192 = 658156859178722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18140491 and 18140500.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18140569) 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 as a sum of consecutive naturals, namely, 9070259 + 9070260.

It is an arithmetic number, because the mean of its divisors is an integer number (9070260).

Almost surely, 218140519 is an apocalyptic number.

18140519 is a deficient number, since it is larger than the sum of its proper divisors (1).

18140519 is an equidigital number, since it uses as much as digits as its factorization.

18140519 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 29.

The square root of 18140519 is about 4259.1688156259. The cubic root of 18140519 is about 262.7543427482.

The spelling of 18140519 in words is "eighteen million, one hundred forty thousand, five hundred nineteen".