13220020 has 24 divisors (see below), whose sum is σ = 30286368. Its totient is φ = 4807200.

The previous prime is 13220003. The next prime is 13220021. The reversal of 13220020 is 2002231.

13220020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 13219979 and 13220006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13220021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29826 + ... + 30265.

It is an arithmetic number, because the mean of its divisors is an integer number (1261932).

Almost surely, 2^13220020 is an apocalyptic number.

13220020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13220020 is an abundant number, since it is smaller than the sum of its proper divisors (17066348).

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

13220020 is a wasteful number, since it uses less digits than its factorization.

13220020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60111 (or 60109 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 13220020 is about 3635.9345428651. The cubic root of 13220020 is about 236.4525692778.

Adding to 13220020 its reverse (2002231), we get a palindrome (15222251).

The spelling of 13220020 in words is "thirteen million, two hundred twenty thousand, twenty".