19316961 has 10 divisors (see below), whose sum is σ = 28856322. Its totient is φ = 12877920.

The previous prime is 19316959. The next prime is 19316993. The reversal of 19316961 is 16961391.

It can be written as a sum of positive squares in only one way, i.e., 18974736 + 342225 = 4356^2 + 585^2 .

It is not a de Polignac number, because 19316961 - 2¹ = 19316959 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19316911) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 119160 + ... + 119321.

Almost surely, 2^19316961 is an apocalyptic number.

It is an amenable number.

19316961 is a deficient number, since it is larger than the sum of its proper divisors (9539361).

19316961 is an equidigital number, since it uses as much as digits as its factorization.

19316961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238493 (or 238484 counting only the distinct ones).

The product of its digits is 8748, while the sum is 36.

The square root of 19316961 is about 4395.1064833517. The cubic root of 19316961 is about 268.3158126321.

The spelling of 19316961 in words is "nineteen million, three hundred sixteen thousand, nine hundred sixty-one".