13821016 has 16 divisors (see below), whose sum is σ = 28270440. Its totient is φ = 6282240.

The previous prime is 13821007. The next prime is 13821019. The reversal of 13821016 is 61012831.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13821019) 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, 78441 + ... + 78616.

Almost surely, 2^13821016 is an apocalyptic number.

It is an amenable number.

13821016 is an abundant number, since it is smaller than the sum of its proper divisors (14449424).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13821016 is a wasteful number, since it uses less digits than its factorization.

13821016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157074 (or 157070 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 13821016 is about 3717.6627065940. The cubic root of 13821016 is about 239.9827302388.

Adding to 13821016 its reverse (61012831), we get a palindrome (74833847).

The spelling of 13821016 in words is "thirteen million, eight hundred twenty-one thousand, sixteen".