18472361 has 4 divisors (see below), whose sum is σ = 18971652. Its totient is φ = 17973072.

The previous prime is 18472291. The next prime is 18472367. The reversal of 18472361 is 16327481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16327481 = 2531 ⋅6451.

It can be written as a sum of positive squares in 2 ways, for example, as 13875625 + 4596736 = 3725^2 + 2144^2 .

It is a cyclic number.

It is not a de Polignac number, because 18472361 - 2²² = 14278057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18472367) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249590 + ... + 249663.

It is an arithmetic number, because the mean of its divisors is an integer number (4742913).

Almost surely, 2^18472361 is an apocalyptic number.

It is an amenable number.

18472361 is a deficient number, since it is larger than the sum of its proper divisors (499291).

18472361 is an equidigital number, since it uses as much as digits as its factorization.

18472361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499290.

The product of its digits is 8064, while the sum is 32.

The square root of 18472361 is about 4297.9484640931. The cubic root of 18472361 is about 264.3468476339.

The spelling of 18472361 in words is "eighteen million, four hundred seventy-two thousand, three hundred sixty-one".