18385407 has 16 divisors (see below), whose sum is σ = 28672000. Its totient is φ = 11611512.

The previous prime is 18385399. The next prime is 18385417. The reversal of 18385407 is 70458381.

It is not a de Polignac number, because 18385407 - 2³ = 18385399 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18385417) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17407 + ... + 18432.

It is an arithmetic number, because the mean of its divisors is an integer number (1792000).

Almost surely, 2^18385407 is an apocalyptic number.

18385407 is a deficient number, since it is larger than the sum of its proper divisors (10286593).

18385407 is a wasteful number, since it uses less digits than its factorization.

18385407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35867 (or 35861 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 18385407 is about 4287.8207751724. The cubic root of 18385407 is about 263.9314129678.

The spelling of 18385407 in words is "eighteen million, three hundred eighty-five thousand, four hundred seven".