19457149 has 6 divisors (see below), whose sum is σ = 20340446. Its totient is φ = 18610680.

The previous prime is 19457117. The next prime is 19457177. The reversal of 19457149 is 94175491.

It can be written as a sum of positive squares in only one way, i.e., 10517049 + 8940100 = 3243^2 + 2990^2 .

It is not a de Polignac number, because 19457149 - 2⁵ = 19457117 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 (19457189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17862 + ... + 18919.

Almost surely, 2^19457149 is an apocalyptic number.

It is an amenable number.

19457149 is a deficient number, since it is larger than the sum of its proper divisors (883297).

19457149 is an equidigital number, since it uses as much as digits as its factorization.

19457149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36827 (or 36804 counting only the distinct ones).

The product of its digits is 45360, while the sum is 40.

The square root of 19457149 is about 4411.0258444040. The cubic root of 19457149 is about 268.9633269980.

The spelling of 19457149 in words is "nineteen million, four hundred fifty-seven thousand, one hundred forty-nine".