19782316 has 6 divisors (see below), whose sum is σ = 34619060. Its totient is φ = 9891156.

The previous prime is 19782299. The next prime is 19782317. The reversal of 19782316 is 61328791.

It is not an unprimeable number, because it can be changed into a prime (19782317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2472786 + ... + 2472793.

Almost surely, 2^19782316 is an apocalyptic number.

It is an amenable number.

19782316 is a deficient number, since it is larger than the sum of its proper divisors (14836744).

19782316 is a wasteful number, since it uses less digits than its factorization.

19782316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4945583 (or 4945581 counting only the distinct ones).

The product of its digits is 18144, while the sum is 37.

The square root of 19782316 is about 4447.7315566477. The cubic root of 19782316 is about 270.4533581372.

The spelling of 19782316 in words is "nineteen million, seven hundred eighty-two thousand, three hundred sixteen".