19340321 has 24 divisors (see below), whose sum is σ = 26155584. Its totient is φ = 13811040.

The previous prime is 19340317. The next prime is 19340327. The reversal of 19340321 is 12304391.

It is not a de Polignac number, because 19340321 - 2² = 19340317 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19340327) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 139070 + ... + 139208.

It is an arithmetic number, because the mean of its divisors is an integer number (1089816).

Almost surely, 2^19340321 is an apocalyptic number.

19340321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

19340321 is a deficient number, since it is larger than the sum of its proper divisors (6815263).

19340321 is a wasteful number, since it uses less digits than its factorization.

19340321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309 (or 170 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 19340321 is about 4397.7631814367. The cubic root of 19340321 is about 268.4239271625.

The spelling of 19340321 in words is "nineteen million, three hundred forty thousand, three hundred twenty-one".