18407145 has 8 divisors (see below), whose sum is σ = 29451456. Its totient is φ = 9817136.

The previous prime is 18407131. The next prime is 18407171. The reversal of 18407145 is 54170481.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18407145 - 2¹¹ = 18405097 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 613557 + ... + 613586.

It is an arithmetic number, because the mean of its divisors is an integer number (3681432).

Almost surely, 2^18407145 is an apocalyptic number.

18407145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18407145 is a deficient number, since it is larger than the sum of its proper divisors (11044311).

18407145 is a wasteful number, since it uses less digits than its factorization.

18407145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1227151.

The product of its (nonzero) digits is 4480, while the sum is 30.

The square root of 18407145 is about 4290.3548804266. The cubic root of 18407145 is about 264.0353918346.

The spelling of 18407145 in words is "eighteen million, four hundred seven thousand, one hundred forty-five".