18620868 has 24 divisors (see below), whose sum is σ = 49655872. Its totient is φ = 5320224.

The previous prime is 18620843. The next prime is 18620873. The reversal of 18620868 is 86802681.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

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, 110755 + ... + 110922.

Almost surely, 2^18620868 is an apocalyptic number.

It is an amenable number.

18620868 is an abundant number, since it is smaller than the sum of its proper divisors (31035004).

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

18620868 is a wasteful number, since it uses less digits than its factorization.

18620868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221691 (or 221689 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 39.

The square root of 18620868 is about 4315.1903781873. The cubic root of 18620868 is about 265.0533558163.

The spelling of 18620868 in words is "eighteen million, six hundred twenty thousand, eight hundred sixty-eight".