13720212 has 48 divisors (see below), whose sum is σ = 38808000. Its totient is φ = 4157280.

The previous prime is 13720211. The next prime is 13720247. The reversal of 13720212 is 21202731.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13720211) 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 15 ways as a sum of consecutive naturals, for example, 4587 + ... + 6962.

It is an arithmetic number, because the mean of its divisors is an integer number (808500).

Almost surely, 2^13720212 is an apocalyptic number.

13720212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13720212 is an abundant number, since it is smaller than the sum of its proper divisors (25087788).

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

13720212 is a wasteful number, since it uses less digits than its factorization.

13720212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11573 (or 11565 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 13720212 is about 3704.0804526900. The cubic root of 13720212 is about 239.3978655723.

Adding to 13720212 its reverse (21202731), we get a palindrome (34922943).

The spelling of 13720212 in words is "thirteen million, seven hundred twenty thousand, two hundred twelve".