13369821 has 8 divisors (see below), whose sum is σ = 17984640. Its totient is φ = 8834112.

The previous prime is 13369819. The next prime is 13369823. The reversal of 13369821 is 12896331.

It is an interprime number because it is at equal distance from previous prime (13369819) and next prime (13369823).

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

It is not a de Polignac number, because 13369821 - 2¹ = 13369819 is a prime.

It is a super-2 number, since 2×13369821² = 357504227144082, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13369823) 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 7 ways as a sum of consecutive naturals, for example, 19381 + ... + 20058.

It is an arithmetic number, because the mean of its divisors is an integer number (2248080).

Almost surely, 2^13369821 is an apocalyptic number.

It is an amenable number.

13369821 is a deficient number, since it is larger than the sum of its proper divisors (4614819).

13369821 is a wasteful number, since it uses less digits than its factorization.

13369821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39555.

The product of its digits is 7776, while the sum is 33.

The square root of 13369821 is about 3656.4765827228. The cubic root of 13369821 is about 237.3423278497.

The spelling of 13369821 in words is "thirteen million, three hundred sixty-nine thousand, eight hundred twenty-one".