13641819 has 8 divisors (see below), whose sum is σ = 18284112. Its totient is φ = 9047040.

The previous prime is 13641811. The next prime is 13641821. The reversal of 13641819 is 91814631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13641819 - 2³ = 13641811 is a prime.

It is a super-2 number, since 2×13641819² = 372198451257522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 13641819.

It is not an unprimeable number, because it can be changed into a prime (13641811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11202 + ... + 12359.

It is an arithmetic number, because the mean of its divisors is an integer number (2285514).

Almost surely, 2^13641819 is an apocalyptic number.

13641819 is a deficient number, since it is larger than the sum of its proper divisors (4642293).

13641819 is a wasteful number, since it uses less digits than its factorization.

13641819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23757.

The product of its digits is 5184, while the sum is 33.

The square root of 13641819 is about 3693.4833152459. The cubic root of 13641819 is about 238.9410462483.

The spelling of 13641819 in words is "thirteen million, six hundred forty-one thousand, eight hundred nineteen".