12694977018 has 128 divisors (see below), whose sum is σ = 31029350400. Its totient is φ = 3831162624.

The previous prime is 12694977017. The next prime is 12694977047. The reversal of 12694977018 is 81077949621.

12694977018 is a `hidden beast` number, since 12 + 69 + 497 + 70 + 18 = 666.

It is a super-2 number, since 2×12694977018² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (12694977017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2543121 + ... + 2548107.

It is an arithmetic number, because the mean of its divisors is an integer number (242416800).

Almost surely, 2^12694977018 is an apocalyptic number.

12694977018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12694977018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15514675200).

12694977018 is an abundant number, since it is smaller than the sum of its proper divisors (18334373382).

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

12694977018 is a wasteful number, since it uses less digits than its factorization.

12694977018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5121 (or 5115 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 54.

The spelling of 12694977018 in words is "twelve billion, six hundred ninety-four million, nine hundred seventy-seven thousand, eighteen".