12600018 has 12 divisors (see below), whose sum is σ = 27300078. Its totient is φ = 4200000.

The previous prime is 12600013. The next prime is 12600023. The reversal of 12600018 is 81000621.

It is an interprime number because it is at equal distance from previous prime (12600013) and next prime (12600023).

It can be written as a sum of positive squares in only one way, i.e., 8450649 + 4149369 = 2907^2 + 2037^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 700001 = 12600018 / (1 + 2 + 6 + 0 + 0 + 0 + 1 + 8).

It is not an unprimeable number, because it can be changed into a prime (12600013) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 349983 + ... + 350018.

Almost surely, 2^12600018 is an apocalyptic number.

12600018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12600018 is an abundant number, since it is smaller than the sum of its proper divisors (14700060).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12600018 is a wasteful number, since it uses less digits than its factorization.

12600018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700009 (or 700006 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 12600018 is about 3549.6504053216. The cubic root of 12600018 is about 232.6967879529.

Adding to 12600018 its reverse (81000621), we get a palindrome (93600639).

The spelling of 12600018 in words is "twelve million, six hundred thousand, eighteen".