18407361 has 16 divisors (see below), whose sum is σ = 28301184. Its totient is φ = 10424064.

The previous prime is 18407357. The next prime is 18407369. The reversal of 18407361 is 16370481.

It is a happy number.

It is not a de Polignac number, because 18407361 - 2² = 18407357 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18407369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1506 + ... + 6251.

It is an arithmetic number, because the mean of its divisors is an integer number (1768824).

Almost surely, 2^18407361 is an apocalyptic number.

It is an amenable number.

18407361 is a deficient number, since it is larger than the sum of its proper divisors (9893823).

18407361 is a wasteful number, since it uses less digits than its factorization.

18407361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7880.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 18407361 is about 4290.3800530955. The cubic root of 18407361 is about 264.0364246115.

The spelling of 18407361 in words is "eighteen million, four hundred seven thousand, three hundred sixty-one".