18806769 has 8 divisors (see below), whose sum is σ = 27861920. Its totient is φ = 12537828.

The previous prime is 18806759. The next prime is 18806779. The reversal of 18806769 is 96760881.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18806759) and next prime (18806779).

It is not a de Polignac number, because 18806769 - 2⁵ = 18806737 is a prime.

It is a super-2 number, since 2×18806769² = 707389120438722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18806719) 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 7 ways as a sum of consecutive naturals, for example, 348247 + ... + 348300.

It is an arithmetic number, because the mean of its divisors is an integer number (3482740).

Almost surely, 2^18806769 is an apocalyptic number.

It is an amenable number.

18806769 is a deficient number, since it is larger than the sum of its proper divisors (9055151).

18806769 is an equidigital number, since it uses as much as digits as its factorization.

18806769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696556 (or 696550 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 18806769 is about 4336.6771842045. The cubic root of 18806769 is about 265.9324880016.

It can be divided in two parts, 1880 and 6769, that added together give a square (8649 = 93²).

The spelling of 18806769 in words is "eighteen million, eight hundred six thousand, seven hundred sixty-nine".