18345670 has 32 divisors (see below), whose sum is σ = 38035008. Its totient is φ = 6240768.

The previous prime is 18345667. The next prime is 18345671. The reversal of 18345670 is 7654381.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18345671) 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, 8634 + ... + 10546.

It is an arithmetic number, because the mean of its divisors is an integer number (1188594).

Almost surely, 2^18345670 is an apocalyptic number.

18345670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18345670 is an abundant number, since it is smaller than the sum of its proper divisors (19689338).

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

18345670 is a wasteful number, since it uses less digits than its factorization.

18345670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2064.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 18345670 is about 4283.1845629158. The cubic root of 18345670 is about 263.7411278583.

The spelling of 18345670 in words is "eighteen million, three hundred forty-five thousand, six hundred seventy".