18940208 has 40 divisors (see below), whose sum is σ = 42163968. Its totient is φ = 8073792.

The previous prime is 18940183. The next prime is 18940241. The reversal of 18940208 is 80204981.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29135 + ... + 29777.

Almost surely, 2^18940208 is an apocalyptic number.

It is an amenable number.

18940208 is an abundant number, since it is smaller than the sum of its proper divisors (23223760).

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

18940208 is a wasteful number, since it uses less digits than its factorization.

18940208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 921 (or 915 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 18940208 is about 4352.0349263304. The cubic root of 18940208 is about 266.5599600849.

The spelling of 18940208 in words is "eighteen million, nine hundred forty thousand, two hundred eight".