19743413 has 4 divisors (see below), whose sum is σ = 20782560. Its totient is φ = 18704268.

The previous prime is 19743397. The next prime is 19743419. The reversal of 19743413 is 31434791.

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 a cyclic number.

It is not a de Polignac number, because 19743413 - 2⁴ = 19743397 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19743413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19743419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 519545 + ... + 519582.

It is an arithmetic number, because the mean of its divisors is an integer number (5195640).

Almost surely, 2^19743413 is an apocalyptic number.

It is an amenable number.

19743413 is a deficient number, since it is larger than the sum of its proper divisors (1039147).

19743413 is a wasteful number, since it uses less digits than its factorization.

19743413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1039146.

The product of its digits is 9072, while the sum is 32.

The square root of 19743413 is about 4443.3560514548. The cubic root of 19743413 is about 270.2759547173.

The spelling of 19743413 in words is "nineteen million, seven hundred forty-three thousand, four hundred thirteen".