19483871 has 4 divisors (see below), whose sum is σ = 21255144. Its totient is φ = 17712600.

The previous prime is 19483861. The next prime is 19483889. The reversal of 19483871 is 17838491.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19483871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19483811) 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, 885620 + ... + 885641.

It is an arithmetic number, because the mean of its divisors is an integer number (5313786).

Almost surely, 2^19483871 is an apocalyptic number.

19483871 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

19483871 is a deficient number, since it is larger than the sum of its proper divisors (1771273).

19483871 is a wasteful number, since it uses less digits than its factorization.

19483871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1771272.

The product of its digits is 48384, while the sum is 41.

The square root of 19483871 is about 4414.0538057436. The cubic root of 19483871 is about 269.0864000181.

The spelling of 19483871 in words is "nineteen million, four hundred eighty-three thousand, eight hundred seventy-one".