18969285 has 16 divisors (see below), whose sum is σ = 30415104. Its totient is φ = 10095552.

The previous prime is 18969259. The next prime is 18969287. The reversal of 18969285 is 58296981.

It is a happy number.

It is not a de Polignac number, because 18969285 - 2⁵ = 18969253 is a prime.

It is a super-2 number, since 2×18969285² = 719667546822450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18969287) 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, 8164 + ... + 10226.

It is an arithmetic number, because the mean of its divisors is an integer number (1900944).

Almost surely, 2^18969285 is an apocalyptic number.

18969285 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18969285 is a deficient number, since it is larger than the sum of its proper divisors (11445819).

18969285 is a wasteful number, since it uses less digits than its factorization.

18969285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2684.

The product of its digits is 311040, while the sum is 48.

The square root of 18969285 is about 4355.3742663519. The cubic root of 18969285 is about 266.6962979226.

The spelling of 18969285 in words is "eighteen million, nine hundred sixty-nine thousand, two hundred eighty-five".