19682401 has 4 divisors (see below), whose sum is σ = 19699092. Its totient is φ = 19665712.

The previous prime is 19682393. The next prime is 19682417. The reversal of 19682401 is 10428691.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15171025 + 4511376 = 3895^2 + 2124^2 .

It is a cyclic number.

It is not a de Polignac number, because 19682401 - 2³ = 19682393 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19682431) 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, 6430 + ... + 8983.

It is an arithmetic number, because the mean of its divisors is an integer number (4924773).

Almost surely, 2^19682401 is an apocalyptic number.

It is an amenable number.

19682401 is a deficient number, since it is larger than the sum of its proper divisors (16691).

19682401 is a wasteful number, since it uses less digits than its factorization.

19682401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16690.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 19682401 is about 4436.4852079095. The cubic root of 19682401 is about 269.9972610605.

The spelling of 19682401 in words is "nineteen million, six hundred eighty-two thousand, four hundred one".