19490965 has 8 divisors (see below), whose sum is σ = 25188408. Its totient is φ = 14393280.

The previous prime is 19490963. The next prime is 19491001. The reversal of 19490965 is 56909491.

It can be written as a sum of positive squares in 4 ways, for example, as 7569 + 19483396 = 87^2 + 4414^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 19490965 - 2¹ = 19490963 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19490963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149866 + ... + 149995.

It is an arithmetic number, because the mean of its divisors is an integer number (3148551).

Almost surely, 2^19490965 is an apocalyptic number.

It is an amenable number.

19490965 is a deficient number, since it is larger than the sum of its proper divisors (5697443).

19490965 is a wasteful number, since it uses less digits than its factorization.

19490965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299879.

The product of its (nonzero) digits is 87480, while the sum is 43.

The square root of 19490965 is about 4414.8573023372. The cubic root of 19490965 is about 269.1190538183.

The spelling of 19490965 in words is "nineteen million, four hundred ninety thousand, nine hundred sixty-five".