2221423020 has 144 divisors (see below), whose sum is σ = 6950911968. Its totient is φ = 573834240.

The previous prime is 2221423013. The next prime is 2221423021. The reversal of 2221423020 is 203241222.

2221423020 is a `hidden beast` number, since 2 + 221 + 423 + 0 + 20 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 2221422984 and 2221423002.

It is not an unprimeable number, because it can be changed into a prime (2221423021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1870867 + ... + 1872053.

It is an arithmetic number, because the mean of its divisors is an integer number (48270222).

Almost surely, 2^2221423020 is an apocalyptic number.

2221423020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2221423020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3475455984).

2221423020 is an abundant number, since it is smaller than the sum of its proper divisors (4729488948).

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

2221423020 is a wasteful number, since it uses less digits than its factorization.

2221423020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1520 (or 1515 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 2221423020 is about 47131.9744971500. The cubic root of 2221423020 is about 1304.7994230860.

Adding to 2221423020 its reverse (203241222), we get a palindrome (2424664242).

The spelling of 2221423020 in words is "two billion, two hundred twenty-one million, four hundred twenty-three thousand, twenty".