12019869 has 12 divisors (see below), whose sum is σ = 18117216. Its totient is φ = 7664712.

The previous prime is 12019849. The next prime is 12019871. The reversal of 12019869 is 96891021.

It is not a de Polignac number, because 12019869 - 2¹⁶ = 11954333 is a prime.

It is a super-2 number, since 2×12019869² = 288954501554322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12019849) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28827 + ... + 29240.

It is an arithmetic number, because the mean of its divisors is an integer number (1509768).

Almost surely, 2^12019869 is an apocalyptic number.

It is an amenable number.

12019869 is a deficient number, since it is larger than the sum of its proper divisors (6097347).

12019869 is a wasteful number, since it uses less digits than its factorization.

12019869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58096 (or 58093 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 12019869 is about 3466.9682721363. The cubic root of 12019869 is about 229.0691362098.

The spelling of 12019869 in words is "twelve million, nineteen thousand, eight hundred sixty-nine".