18045739 has 2 divisors, whose sum is σ = 18045740. Its totient is φ = 18045738.

The previous prime is 18045679. The next prime is 18045773. The reversal of 18045739 is 93754081.

18045739 = T₃₄₆₇ + T₃₄₆₈ + T₃₄₆₉.

It is a strong prime.

It is an emirp because it is prime and its reverse (93754081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18045739 - 2¹⁵ = 18012971 is a prime.

It is a super-2 number, since 2×18045739² = 651297392112242, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18045698 and 18045707.

It is not a weakly prime, because it can be changed into another prime (18045439) 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, 9022869 + 9022870.

It is an arithmetic number, because the mean of its divisors is an integer number (9022870).

Almost surely, 2^18045739 is an apocalyptic number.

18045739 is the 3469-th centered triangular number.

18045739 is a deficient number, since it is larger than the sum of its proper divisors (1).

18045739 is an equidigital number, since it uses as much as digits as its factorization.

18045739 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 18045739 is about 4248.0276599853. The cubic root of 18045739 is about 262.2959333126.

The spelling of 18045739 in words is "eighteen million, forty-five thousand, seven hundred thirty-nine".