18948240 has 60 divisors (see below), whose sum is σ = 63636924. Its totient is φ = 5052672.

The previous prime is 18948221. The next prime is 18948253. The reversal of 18948240 is 4284981.

It can be written as a sum of positive squares in 2 ways, for example, as 9511056 + 9437184 = 3084^2 + 3072^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 18948195 and 18948204.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12439 + ... + 13878.

Almost surely, 2^18948240 is an apocalyptic number.

18948240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18948240 is an abundant number, since it is smaller than the sum of its proper divisors (44688684).

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

18948240 is a wasteful number, since it uses less digits than its factorization.

18948240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26336 (or 26327 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 18948240 is about 4352.9576152313. The cubic root of 18948240 is about 266.5976349091.

The spelling of 18948240 in words is "eighteen million, nine hundred forty-eight thousand, two hundred forty".