19947316 has 12 divisors (see below), whose sum is σ = 34957188. Its totient is φ = 9959552.

The previous prime is 19947293. The next prime is 19947349. The reversal of 19947316 is 61374991.

19947316 is nontrivially palindromic in base 15.

It can be written as a sum of positive squares in 2 ways, for example, as 16160400 + 3786916 = 4020^2 + 1946^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60 + ... + 6316.

It is an arithmetic number, because the mean of its divisors is an integer number (2913099).

Almost surely, 2^19947316 is an apocalyptic number.

It is an amenable number.

19947316 is a deficient number, since it is larger than the sum of its proper divisors (15009872).

19947316 is a wasteful number, since it uses less digits than its factorization.

19947316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7058 (or 7056 counting only the distinct ones).

The product of its digits is 40824, while the sum is 40.

The square root of 19947316 is about 4466.2418205914. The cubic root of 19947316 is about 271.2032081079.

The spelling of 19947316 in words is "nineteen million, nine hundred forty-seven thousand, three hundred sixteen".