18419385 has 16 divisors (see below), whose sum is σ = 29546496. Its totient is φ = 9798528.

The previous prime is 18419383. The next prime is 18419393. The reversal of 18419385 is 58391481.

It is not a de Polignac number, because 18419385 - 2¹ = 18419383 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18419383) 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, 5512 + ... + 8198.

It is an arithmetic number, because the mean of its divisors is an integer number (1846656).

Almost surely, 2^18419385 is an apocalyptic number.

18419385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18419385 is a deficient number, since it is larger than the sum of its proper divisors (11127111).

18419385 is a wasteful number, since it uses less digits than its factorization.

18419385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3152.

The product of its digits is 34560, while the sum is 39.

The square root of 18419385 is about 4291.7810987980. The cubic root of 18419385 is about 264.0939031196.

The spelling of 18419385 in words is "eighteen million, four hundred nineteen thousand, three hundred eighty-five".