18908670 has 48 divisors (see below), whose sum is σ = 49890960. Its totient is φ = 4583040.

The previous prime is 18908663. The next prime is 18908693. The reversal of 18908670 is 7680981.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1026 + ... + 6234.

It is an arithmetic number, because the mean of its divisors is an integer number (1039395).

Almost surely, 2^18908670 is an apocalyptic number.

18908670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18908670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24945480).

18908670 is an abundant number, since it is smaller than the sum of its proper divisors (30982290).

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

18908670 is a wasteful number, since it uses less digits than its factorization.

18908670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5241 (or 5230 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 39.

The square root of 18908670 is about 4348.4100542612. The cubic root of 18908670 is about 266.4119251306.

The spelling of 18908670 in words is "eighteen million, nine hundred eight thousand, six hundred seventy".