12135474018 has 48 divisors (see below), whose sum is σ = 27026039040. Its totient is φ = 3933310752.

The previous prime is 12135473939. The next prime is 12135474019. The reversal of 12135474018 is 81047453121.

It is not an unprimeable number, because it can be changed into a prime (12135474019) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 137448 + ... + 207756.

It is an arithmetic number, because the mean of its divisors is an integer number (563042480).

Almost surely, 2^12135474018 is an apocalyptic number.

12135474018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12135474018 is an abundant number, since it is smaller than the sum of its proper divisors (14890565022).

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

12135474018 is a wasteful number, since it uses less digits than its factorization.

12135474018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70583 (or 70580 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

It can be divided in two parts, 12 and 135474018, that added together give a triangular number (135474030 = T₁₆₄₆₀).

The spelling of 12135474018 in words is "twelve billion, one hundred thirty-five million, four hundred seventy-four thousand, eighteen".