12513018 has 32 divisors (see below), whose sum is σ = 28748160. Its totient is φ = 3556800.

The previous prime is 12512999. The next prime is 12513019. The reversal of 12513018 is 81031521.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 12512985 and 12513003.

It is not an unprimeable number, because it can be changed into a prime (12513019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8968 + ... + 10268.

It is an arithmetic number, because the mean of its divisors is an integer number (898380).

Almost surely, 2^12513018 is an apocalyptic number.

12513018 is an abundant number, since it is smaller than the sum of its proper divisors (16235142).

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

12513018 is a wasteful number, since it uses less digits than its factorization.

12513018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1542.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 12513018 is about 3537.3744500689. The cubic root of 12513018 is about 232.1599793333.

Adding to 12513018 its reverse (81031521), we get a palindrome (93544539).

The spelling of 12513018 in words is "twelve million, five hundred thirteen thousand, eighteen".