18980845 has 16 divisors (see below), whose sum is σ = 25103232. Its totient is φ = 13688640.

The previous prime is 18980839. The next prime is 18980869. The reversal of 18980845 is 54808981.

It is not a de Polignac number, because 18980845 - 2⁵ = 18980813 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 601 + ... + 6190.

It is an arithmetic number, because the mean of its divisors is an integer number (1568952).

Almost surely, 2^18980845 is an apocalyptic number.

It is an amenable number.

18980845 is a deficient number, since it is larger than the sum of its proper divisors (6122387).

18980845 is a wasteful number, since it uses less digits than its factorization.

18980845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6852.

The product of its (nonzero) digits is 92160, while the sum is 43.

The square root of 18980845 is about 4356.7011602817. The cubic root of 18980845 is about 266.7504623811.

The spelling of 18980845 in words is "eighteen million, nine hundred eighty thousand, eight hundred forty-five".