18006769 has 16 divisors (see below), whose sum is σ = 20726784. Its totient is φ = 15483600.

The previous prime is 18006763. The next prime is 18006839. The reversal of 18006769 is 96760081.

It is a de Polignac number, because none of the positive numbers 2^k-18006769 is a prime.

It is a super-2 number, since 2×18006769² = 648487459638722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18006763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25714 + ... + 26404.

It is an arithmetic number, because the mean of its divisors is an integer number (1295424).

Almost surely, 2^18006769 is an apocalyptic number.

It is an amenable number.

18006769 is a deficient number, since it is larger than the sum of its proper divisors (2720015).

18006769 is a wasteful number, since it uses less digits than its factorization.

18006769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 828.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 18006769 is about 4243.4383464356. The cubic root of 18006769 is about 262.1069867825.

The spelling of 18006769 in words is "eighteen million, six thousand, seven hundred sixty-nine".