19229985 has 12 divisors (see below), whose sum is σ = 33332052. Its totient is φ = 10255968.

The previous prime is 19229981. The next prime is 19229989. The reversal of 19229985 is 58992291.

It is an interprime number because it is at equal distance from previous prime (19229981) and next prime (19229989).

It can be written as a sum of positive squares in 2 ways, for example, as 9884736 + 9345249 = 3144^2 + 3057^2 .

It is not a de Polignac number, because 19229985 - 2² = 19229981 is a prime.

It is a super-3 number, since 3×19229985³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 427333 = 19229985 / (1 + 9 + 2 + 2 + 9 + 9 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 19229985.

It is not an unprimeable number, because it can be changed into a prime (19229981) 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 11 ways as a sum of consecutive naturals, for example, 213622 + ... + 213711.

It is an arithmetic number, because the mean of its divisors is an integer number (2777671).

Almost surely, 2^19229985 is an apocalyptic number.

19229985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19229985 is a deficient number, since it is larger than the sum of its proper divisors (14102067).

19229985 is a wasteful number, since it uses less digits than its factorization.

19229985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427344 (or 427341 counting only the distinct ones).

The product of its digits is 116640, while the sum is 45.

The square root of 19229985 is about 4385.2006795585. The cubic root of 19229985 is about 267.9125029956.

The spelling of 19229985 in words is "nineteen million, two hundred twenty-nine thousand, nine hundred eighty-five".