13820869 has 8 divisors (see below), whose sum is σ = 14331168. Its totient is φ = 13317840.

The previous prime is 13820857. The next prime is 13820887. The reversal of 13820869 is 96802831.

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

It is a cyclic number.

It is not a de Polignac number, because 13820869 - 2¹¹ = 13818821 is a prime.

It is a super-2 number, since 2×13820869² = 382032839830322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13820819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2214 + ... + 5704.

It is an arithmetic number, because the mean of its divisors is an integer number (1791396).

Almost surely, 2^13820869 is an apocalyptic number.

It is an amenable number.

13820869 is a deficient number, since it is larger than the sum of its proper divisors (510299).

13820869 is a wasteful number, since it uses less digits than its factorization.

13820869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3635.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 13820869 is about 3717.6429360550. The cubic root of 13820869 is about 239.9818794189.

The spelling of 13820869 in words is "thirteen million, eight hundred twenty thousand, eight hundred sixty-nine".