19723413 has 4 divisors (see below), whose sum is σ = 26297888. Its totient is φ = 13148940.

The previous prime is 19723411. The next prime is 19723421. The reversal of 19723413 is 31432791.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 19723413 - 2¹ = 19723411 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 (19723411) 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 3 ways as a sum of consecutive naturals, for example, 3287233 + ... + 3287238.

It is an arithmetic number, because the mean of its divisors is an integer number (6574472).

Almost surely, 2^19723413 is an apocalyptic number.

It is an amenable number.

19723413 is a deficient number, since it is larger than the sum of its proper divisors (6574475).

19723413 is an equidigital number, since it uses as much as digits as its factorization.

19723413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6574474.

The product of its digits is 4536, while the sum is 30.

The square root of 19723413 is about 4441.1049300822. The cubic root of 19723413 is about 270.1846610560.

The spelling of 19723413 in words is "nineteen million, seven hundred twenty-three thousand, four hundred thirteen".