19421313 has 8 divisors (see below), whose sum is σ = 26186400. Its totient is φ = 12801888.

The previous prime is 19421239. The next prime is 19421323. The reversal of 19421313 is 31312491.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 19421313 - 2⁹ = 19420801 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19421323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36103 + ... + 36636.

It is an arithmetic number, because the mean of its divisors is an integer number (3273300).

Almost surely, 2^19421313 is an apocalyptic number.

It is an amenable number.

19421313 is a deficient number, since it is larger than the sum of its proper divisors (6765087).

19421313 is an equidigital number, since it uses as much as digits as its factorization.

19421313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72831.

The product of its digits is 648, while the sum is 24.

The square root of 19421313 is about 4406.9618786643. The cubic root of 19421313 is about 268.7981007829.

The spelling of 19421313 in words is "nineteen million, four hundred twenty-one thousand, three hundred thirteen".