19840313 has 4 divisors (see below), whose sum is σ = 20884560. Its totient is φ = 18796068.

The previous prime is 19840307. The next prime is 19840319. The reversal of 19840313 is 31304891.

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 an interprime number because it is at equal distance from previous prime (19840307) and next prime (19840319).

It is a cyclic number.

It is not a de Polignac number, because 19840313 - 2²⁰ = 18791737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19840319) 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, 522095 + ... + 522132.

It is an arithmetic number, because the mean of its divisors is an integer number (5221140).

Almost surely, 2^19840313 is an apocalyptic number.

It is an amenable number.

19840313 is a deficient number, since it is larger than the sum of its proper divisors (1044247).

19840313 is a wasteful number, since it uses less digits than its factorization.

19840313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1044246.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 19840313 is about 4454.2466254127. The cubic root of 19840313 is about 270.7174017008.

The spelling of 19840313 in words is "nineteen million, eight hundred forty thousand, three hundred thirteen".