4455321220 has 24 divisors (see below), whose sum is σ = 10692771264. Its totient is φ = 1527538656.

The previous prime is 4455321193. The next prime is 4455321239. The reversal of 4455321220 is 221235544.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15911722 + ... + 15912001.

It is an arithmetic number, because the mean of its divisors is an integer number (445532136).

Almost surely, 2^4455321220 is an apocalyptic number.

It is an amenable number.

4455321220 is an abundant number, since it is smaller than the sum of its proper divisors (6237450044).

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

4455321220 is a wasteful number, since it uses less digits than its factorization.

4455321220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31823739 (or 31823737 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 4455321220 is about 66748.1926347073. The cubic root of 4455321220 is about 1645.4815120198.

Adding to 4455321220 its reverse (221235544), we get a palindrome (4676556764).

The spelling of 4455321220 in words is "four billion, four hundred fifty-five million, three hundred twenty-one thousand, two hundred twenty".