18713412 has 18 divisors (see below), whose sum is σ = 47303438. Its totient is φ = 6237792.

The previous prime is 18713411. The next prime is 18713437. The reversal of 18713412 is 21431781.

It can be written as a sum of positive squares in only one way, i.e., 11128896 + 7584516 = 3336^2 + 2754^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (18713411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 259873 + ... + 259944.

Almost surely, 2^18713412 is an apocalyptic number.

18713412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18713412 is an abundant number, since it is smaller than the sum of its proper divisors (28590026).

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

18713412 is a wasteful number, since it uses less digits than its factorization.

18713412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519827 (or 519822 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 18713412 is about 4325.9001375436. The cubic root of 18713412 is about 265.4917273216.

The spelling of 18713412 in words is "eighteen million, seven hundred thirteen thousand, four hundred twelve".