18739065 has 16 divisors (see below), whose sum is σ = 30038400. Its totient is φ = 9975552.

The previous prime is 18739031. The next prime is 18739067. The reversal of 18739065 is 56093781.

It is not a de Polignac number, because 18739065 - 2¹⁷ = 18607993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18739067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11841 + ... + 13329.

It is an arithmetic number, because the mean of its divisors is an integer number (1877400).

Almost surely, 2^18739065 is an apocalyptic number.

18739065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18739065 is a deficient number, since it is larger than the sum of its proper divisors (11299335).

18739065 is a wasteful number, since it uses less digits than its factorization.

18739065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2336.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 18739065 is about 4328.8641697332. The cubic root of 18739065 is about 265.6129870461.

The spelling of 18739065 in words is "eighteen million, seven hundred thirty-nine thousand, sixty-five".