12018869 has 2 divisors, whose sum is σ = 12018870. Its totient is φ = 12018868.

The previous prime is 12018841. The next prime is 12018871. The reversal of 12018869 is 96881021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9579025 + 2439844 = 3095^2 + 1562^2 .

It is a cyclic number.

It is not a de Polignac number, because 12018869 - 2⁸ = 12018613 is a prime.

It is a super-2 number, since 2×12018869² = 288906424078322, which contains 22 as substring.

Together with 12018871, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12018169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6009434 + 6009435.

It is an arithmetic number, because the mean of its divisors is an integer number (6009435).

Almost surely, 2^12018869 is an apocalyptic number.

It is an amenable number.

12018869 is a deficient number, since it is larger than the sum of its proper divisors (1).

12018869 is an equidigital number, since it uses as much as digits as its factorization.

12018869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 12018869 is about 3466.8240509146. The cubic root of 12018869 is about 229.0627835202.

The spelling of 12018869 in words is "twelve million, eighteen thousand, eight hundred sixty-nine".