13620220 has 12 divisors (see below), whose sum is σ = 28602504. Its totient is φ = 5448080.

The previous prime is 13620199. The next prime is 13620223. The reversal of 13620220 is 2202631.

It is a junction number, because it is equal to n+sod(n) for n = 13620194 and 13620203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13620223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 340486 + ... + 340525.

It is an arithmetic number, because the mean of its divisors is an integer number (2383542).

Almost surely, 2^13620220 is an apocalyptic number.

13620220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13620220 is an abundant number, since it is smaller than the sum of its proper divisors (14982284).

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

13620220 is a wasteful number, since it uses less digits than its factorization.

13620220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681020 (or 681018 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 13620220 is about 3690.5582233586. The cubic root of 13620220 is about 238.8148750539.

Adding to 13620220 its reverse (2202631), we get a palindrome (15822851).

The spelling of 13620220 in words is "thirteen million, six hundred twenty thousand, two hundred twenty".