13820963 has 4 divisors (see below), whose sum is σ = 14884128. Its totient is φ = 12757800.

The previous prime is 13820959. The next prime is 13820981. The reversal of 13820963 is 36902831.

13820963 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 13820963 - 2² = 13820959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13820903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 531563 + ... + 531588.

It is an arithmetic number, because the mean of its divisors is an integer number (3721032).

Almost surely, 2^13820963 is an apocalyptic number.

13820963 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

13820963 is a deficient number, since it is larger than the sum of its proper divisors (1063165).

13820963 is a wasteful number, since it uses less digits than its factorization.

13820963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1063164.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 13820963 is about 3717.6555784526. The cubic root of 13820963 is about 239.9824234813.

The spelling of 13820963 in words is "thirteen million, eight hundred twenty thousand, nine hundred sixty-three".