18780484 has 6 divisors (see below), whose sum is σ = 32865854. Its totient is φ = 9390240.

The previous prime is 18780479. The next prime is 18780523. The reversal of 18780484 is 48408781.

It can be written as a sum of positive squares in only one way, i.e., 10497600 + 8282884 = 3240^2 + 2878^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2347557 + ... + 2347564.

Almost surely, 2^18780484 is an apocalyptic number.

It is an amenable number.

18780484 is a deficient number, since it is larger than the sum of its proper divisors (14085370).

18780484 is a wasteful number, since it uses less digits than its factorization.

18780484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4695125 (or 4695123 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 40.

The square root of 18780484 is about 4333.6455784939. The cubic root of 18780484 is about 265.8085380471.

The spelling of 18780484 in words is "eighteen million, seven hundred eighty thousand, four hundred eighty-four".