19640327 has 6 divisors (see below), whose sum is σ = 22846968. Its totient is φ = 16834524.

The previous prime is 19640323. The next prime is 19640347. The reversal of 19640327 is 72304691.

It is not a de Polignac number, because 19640327 - 2² = 19640323 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19640293 and 19640302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19640323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 200363 + ... + 200460.

It is an arithmetic number, because the mean of its divisors is an integer number (3807828).

Almost surely, 2^19640327 is an apocalyptic number.

19640327 is a deficient number, since it is larger than the sum of its proper divisors (3206641).

19640327 is an equidigital number, since it uses as much as digits as its factorization.

19640327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400837 (or 400830 counting only the distinct ones).

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

The square root of 19640327 is about 4431.7408543370. The cubic root of 19640327 is about 269.8047376510.

The spelling of 19640327 in words is "nineteen million, six hundred forty thousand, three hundred twenty-seven".