18494385 has 64 divisors (see below), whose sum is σ = 38610432. Its totient is φ = 7335936.

The previous prime is 18494381. The next prime is 18494389. The reversal of 18494385 is 58349481.

It is an interprime number because it is at equal distance from previous prime (18494381) and next prime (18494389).

It is not a de Polignac number, because 18494385 - 2² = 18494381 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18494381) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 22807 + ... + 23603.

It is an arithmetic number, because the mean of its divisors is an integer number (603288).

Almost surely, 2^18494385 is an apocalyptic number.

18494385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18494385 is an abundant number, since it is smaller than the sum of its proper divisors (20116047).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18494385 is a wasteful number, since it uses less digits than its factorization.

18494385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842.

The product of its digits is 138240, while the sum is 42.

The square root of 18494385 is about 4300.5098534941. The cubic root of 18494385 is about 264.4518633151.

The spelling of 18494385 in words is "eighteen million, four hundred ninety-four thousand, three hundred eighty-five".