19944271 has 4 divisors (see below), whose sum is σ = 20320632. Its totient is φ = 19567912.

The previous prime is 19944269. The next prime is 19944293. The reversal of 19944271 is 17244991.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19944271 - 2¹ = 19944269 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 19944271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19944241) 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, 188101 + ... + 188206.

It is an arithmetic number, because the mean of its divisors is an integer number (5080158).

Almost surely, 2^19944271 is an apocalyptic number.

19944271 is a deficient number, since it is larger than the sum of its proper divisors (376361).

19944271 is an equidigital number, since it uses as much as digits as its factorization.

19944271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376360.

The product of its digits is 18144, while the sum is 37.

The square root of 19944271 is about 4465.9009169483. The cubic root of 19944271 is about 271.1894074911.

The spelling of 19944271 in words is "nineteen million, nine hundred forty-four thousand, two hundred seventy-one".