19957316 has 12 divisors (see below), whose sum is σ = 34958700. Its totient is φ = 9969120.

The previous prime is 19957313. The next prime is 19957321. The reversal of 19957316 is 61375991.

It can be written as a sum of positive squares in 2 ways, for example, as 11195716 + 8761600 = 3346^2 + 2960^2 .

It is not an unprimeable number, because it can be changed into a prime (19957313) 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, 4586 + ... + 7806.

It is an arithmetic number, because the mean of its divisors is an integer number (2913225).

Almost surely, 2^19957316 is an apocalyptic number.

It is an amenable number.

19957316 is a deficient number, since it is larger than the sum of its proper divisors (15001384).

19957316 is a wasteful number, since it uses less digits than its factorization.

19957316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4774 (or 4772 counting only the distinct ones).

The product of its digits is 51030, while the sum is 41.

The square root of 19957316 is about 4467.3611897853. The cubic root of 19957316 is about 271.2485204532.

The spelling of 19957316 in words is "nineteen million, nine hundred fifty-seven thousand, three hundred sixteen".