18069838 has 16 divisors (see below), whose sum is σ = 28738944. Its totient is φ = 8506080.

The previous prime is 18069823. The next prime is 18069841. The reversal of 18069838 is 83896081.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 18069794 and 18069803.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1645 + ... + 6232.

It is an arithmetic number, because the mean of its divisors is an integer number (1796184).

Almost surely, 2^18069838 is an apocalyptic number.

18069838 is a deficient number, since it is larger than the sum of its proper divisors (10669106).

18069838 is a wasteful number, since it uses less digits than its factorization.

18069838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7947.

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 18069838 is about 4250.8632064558. The cubic root of 18069838 is about 262.4126415280.

The spelling of 18069838 in words is "eighteen million, sixty-nine thousand, eight hundred thirty-eight".