18147412 has 12 divisors (see below), whose sum is σ = 32357556. Its totient is φ = 8902400.

The previous prime is 18147403. The next prime is 18147421. The reversal of 18147412 is 21474181.

It is an interprime number because it is at equal distance from previous prime (18147403) and next prime (18147421).

It can be written as a sum of positive squares in 2 ways, for example, as 10329796 + 7817616 = 3214^2 + 2796^2 .

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42589 + ... + 43012.

It is an arithmetic number, because the mean of its divisors is an integer number (2696463).

Almost surely, 2^18147412 is an apocalyptic number.

It is an amenable number.

18147412 is a deficient number, since it is larger than the sum of its proper divisors (14210144).

18147412 is a wasteful number, since it uses less digits than its factorization.

18147412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85658 (or 85656 counting only the distinct ones).

The product of its digits is 1792, while the sum is 28.

The square root of 18147412 is about 4259.9779342152. The cubic root of 18147412 is about 262.7876188328.

The spelling of 18147412 in words is "eighteen million, one hundred forty-seven thousand, four hundred twelve".