19481 has 12 divisors (see below), whose sum is σ = 25536. Its totient is φ = 14520.

The previous prime is 19477. The next prime is 19483. The reversal of 19481 is 18491.

19481 is nontrivially palindromic in base 2.

It is not a de Polignac number, because 19481 - 2² = 19477 is a prime.

It is a super-2 number, since 2×19481² = 759018722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 19481.

It is not an unprimeable number, because it can be changed into a prime (19483) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 836 + ... + 858.

It is an arithmetic number, because the mean of its divisors is an integer number (2128).

2¹⁹⁴⁸¹ is an apocalyptic number.

19481 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

19481 is a deficient number, since it is larger than the sum of its proper divisors (6055).

19481 is a wasteful number, since it uses less digits than its factorization.

19481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52 (or 41 counting only the distinct ones).

The product of its digits is 288, while the sum is 23.

The square root of 19481 is about 139.5743529449. The cubic root of 19481 is about 26.9073182504.

Subtracting from 19481 its reverse (18491), we obtain a triangular number (990 = T₄₄).

The spelling of 19481 in words is "nineteen thousand, four hundred eighty-one".