13621814 has 4 divisors (see below), whose sum is σ = 20432724. Its totient is φ = 6810906.

The previous prime is 13621801. The next prime is 13621823. The reversal of 13621814 is 41812631.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3405452 + ... + 3405455.

It is an arithmetic number, because the mean of its divisors is an integer number (5108181).

Almost surely, 2^13621814 is an apocalyptic number.

13621814 is a deficient number, since it is larger than the sum of its proper divisors (6810910).

13621814 is an equidigital number, since it uses as much as digits as its factorization.

13621814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6810909.

The product of its digits is 1152, while the sum is 26.

The square root of 13621814 is about 3690.7741735305. The cubic root of 13621814 is about 238.8241910087.

The spelling of 13621814 in words is "thirteen million, six hundred twenty-one thousand, eight hundred fourteen".