18718468 has 24 divisors (see below), whose sum is σ = 33755904. Its totient is φ = 9076800.

The previous prime is 18718463. The next prime is 18718489. The reversal of 18718468 is 86481781.

It is not an unprimeable number, because it can be changed into a prime (18718463) 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, 50821 + ... + 51187.

It is an arithmetic number, because the mean of its divisors is an integer number (1406496).

Almost surely, 2^18718468 is an apocalyptic number.

It is an amenable number.

18718468 is a deficient number, since it is larger than the sum of its proper divisors (15037436).

18718468 is a wasteful number, since it uses less digits than its factorization.

18718468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723 (or 721 counting only the distinct ones).

The product of its digits is 86016, while the sum is 43.

The square root of 18718468 is about 4326.4844851218. The cubic root of 18718468 is about 265.5156354024.

The spelling of 18718468 in words is "eighteen million, seven hundred eighteen thousand, four hundred sixty-eight".