19328481 has 12 divisors (see below), whose sum is σ = 27965652. Its totient is φ = 12864096.

The previous prime is 19328479. The next prime is 19328489. The reversal of 19328481 is 18482391.

It can be written as a sum of positive squares in 2 ways, for example, as 5198400 + 14130081 = 2280^2 + 3759^2 .

It is not a de Polignac number, because 19328481 - 2¹ = 19328479 is a prime.

It is a super-2 number, since 2×19328481² = 747180355534722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19328489) 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, 5395 + ... + 8231.

It is an arithmetic number, because the mean of its divisors is an integer number (2330471).

Almost surely, 2^19328481 is an apocalyptic number.

It is an amenable number.

19328481 is a deficient number, since it is larger than the sum of its proper divisors (8637171).

19328481 is a wasteful number, since it uses less digits than its factorization.

19328481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3600 (or 3597 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 19328481 is about 4396.4168364704. The cubic root of 19328481 is about 268.3691402735.

The spelling of 19328481 in words is "nineteen million, three hundred twenty-eight thousand, four hundred eighty-one".