19416749 has 12 divisors (see below), whose sum is σ = 21924252. Its totient is φ = 17170560.

The previous prime is 19416743. The next prime is 19416751. The reversal of 19416749 is 94761491.

It can be written as a sum of positive squares in 2 ways, for example, as 7562500 + 11854249 = 2750^2 + 3443^2 .

It is not a de Polignac number, because 19416749 - 2²⁰ = 18368173 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19416743) 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 11 ways as a sum of consecutive naturals, for example, 2309 + ... + 6645.

It is an arithmetic number, because the mean of its divisors is an integer number (1827021).

Almost surely, 2^19416749 is an apocalyptic number.

It is an amenable number.

19416749 is a deficient number, since it is larger than the sum of its proper divisors (2507503).

19416749 is a wasteful number, since it uses less digits than its factorization.

19416749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4396 (or 4385 counting only the distinct ones).

The product of its digits is 54432, while the sum is 41.

The square root of 19416749 is about 4406.4440311889. Note that the first 3 decimals coincide. The cubic root of 19416749 is about 268.7770433215. Note that the first 3 decimals are identical.

The spelling of 19416749 in words is "nineteen million, four hundred sixteen thousand, seven hundred forty-nine".