13222020 has 48 divisors (see below), whose sum is σ = 42311808. Its totient is φ = 3022080.

The previous prime is 13221997. The next prime is 13222031. The reversal of 13222020 is 2022231.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 13221987 and 13222005.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15321 + ... + 16160.

It is an arithmetic number, because the mean of its divisors is an integer number (881496).

Almost surely, 2^13222020 is an apocalyptic number.

13222020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13222020 is an abundant number, since it is smaller than the sum of its proper divisors (29089788).

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

13222020 is a wasteful number, since it uses less digits than its factorization.

13222020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31500 (or 31498 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 13222020 is about 3636.2095649178. The cubic root of 13222020 is about 236.4644926408.

Adding to 13222020 its reverse (2022231), we get a palindrome (15244251).

The spelling of 13222020 in words is "thirteen million, two hundred twenty-two thousand, twenty".