18878241 has 8 divisors (see below), whose sum is σ = 25194240. Its totient is φ = 12573872.

The previous prime is 18878227. The next prime is 18878257. The reversal of 18878241 is 14287881.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18878241 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18878241.

It is not an unprimeable number, because it can be changed into a prime (18878221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2131 + ... + 6503.

It is an arithmetic number, because the mean of its divisors is an integer number (3149280).

Almost surely, 2^18878241 is an apocalyptic number.

It is an amenable number.

18878241 is a deficient number, since it is larger than the sum of its proper divisors (6315999).

18878241 is a wasteful number, since it uses less digits than its factorization.

18878241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5815.

The product of its digits is 28672, while the sum is 39.

The square root of 18878241 is about 4344.9097804212. The cubic root of 18878241 is about 266.2689395595.

The spelling of 18878241 in words is "eighteen million, eight hundred seventy-eight thousand, two hundred forty-one".