14013821 has 2 divisors, whose sum is σ = 14013822. Its totient is φ = 14013820.

The previous prime is 14013799. The next prime is 14013823. The reversal of 14013821 is 12831041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12888100 + 1125721 = 3590^2 + 1061^2 .

It is a cyclic number.

It is not a de Polignac number, because 14013821 - 2²² = 9819517 is a prime.

Together with 14013823, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p₉₁₀₉₁₀ and since 14013821 and 910910 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 14013793 and 14013802.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14013823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7006910 + 7006911.

It is an arithmetic number, because the mean of its divisors is an integer number (7006911).

Almost surely, 2^14013821 is an apocalyptic number.

It is an amenable number.

14013821 is a deficient number, since it is larger than the sum of its proper divisors (1).

14013821 is an equidigital number, since it uses as much as digits as its factorization.

14013821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 14013821 is about 3743.5038399873. The cubic root of 14013821 is about 241.0935112287.

Adding to 14013821 its reverse (12831041), we get a palindrome (26844862).

The spelling of 14013821 in words is "fourteen million, thirteen thousand, eight hundred twenty-one".