18980618 has 8 divisors (see below), whose sum is σ = 29389440. Its totient is φ = 9184140.

The previous prime is 18980617. The next prime is 18980629. The reversal of 18980618 is 81608981.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18980617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153008 + ... + 153131.

It is an arithmetic number, because the mean of its divisors is an integer number (3673680).

Almost surely, 2^18980618 is an apocalyptic number.

18980618 is a deficient number, since it is larger than the sum of its proper divisors (10408822).

18980618 is a wasteful number, since it uses less digits than its factorization.

18980618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306172.

The product of its (nonzero) digits is 27648, while the sum is 41.

The square root of 18980618 is about 4356.6751083825. The cubic root of 18980618 is about 266.7493989827.

The spelling of 18980618 in words is "eighteen million, nine hundred eighty thousand, six hundred eighteen".