18980782 has 8 divisors (see below), whose sum is σ = 28520352. Its totient is φ = 9474000.

The previous prime is 18980779. The next prime is 18980783. The reversal of 18980782 is 28708981.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18980783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6694 + ... + 9097.

It is an arithmetic number, because the mean of its divisors is an integer number (3565044).

Almost surely, 2^18980782 is an apocalyptic number.

18980782 is a deficient number, since it is larger than the sum of its proper divisors (9539570).

18980782 is a wasteful number, since it uses less digits than its factorization.

18980782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16394.

The product of its (nonzero) digits is 64512, while the sum is 43.

The square root of 18980782 is about 4356.6939300346. The cubic root of 18980782 is about 266.7501672537.

The spelling of 18980782 in words is "eighteen million, nine hundred eighty thousand, seven hundred eighty-two".