13820357 has 4 divisors (see below), whose sum is σ = 13827840. Its totient is φ = 13812876.

The previous prime is 13820299. The next prime is 13820381. The reversal of 13820357 is 75302831.

13820357 is digitally balanced in base 2, 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, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 75302831 = 331 ⋅227501.

It is a cyclic number.

It is not a de Polignac number, because 13820357 - 2⁶ = 13820293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13820857) 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, 1244 + ... + 5402.

It is an arithmetic number, because the mean of its divisors is an integer number (3456960).

Almost surely, 2^13820357 is an apocalyptic number.

It is an amenable number.

13820357 is a deficient number, since it is larger than the sum of its proper divisors (7483).

13820357 is an equidigital number, since it uses as much as digits as its factorization.

13820357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7482.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 13820357 is about 3717.5740745814. The cubic root of 13820357 is about 239.9789159719.

The spelling of 13820357 in words is "thirteen million, eight hundred twenty thousand, three hundred fifty-seven".