220423063440 has 160 divisors (see below), whose sum is σ = 692403540480. Its totient is φ = 57998333952.

The previous prime is 220423063429. The next prime is 220423063501. The reversal of 220423063440 is 44360324022.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 220423063398 and 220423063407.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 42410922 + ... + 42416118.

It is an arithmetic number, because the mean of its divisors is an integer number (4327522128).

Almost surely, 2^220423063440 is an apocalyptic number.

220423063440 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 220423063440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (346201770240).

220423063440 is an abundant number, since it is smaller than the sum of its proper divisors (471980477040).

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

220423063440 is a wasteful number, since it uses less digits than its factorization.

220423063440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7529 (or 7523 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 30.

Adding to 220423063440 its reverse (44360324022), we get a palindrome (264783387462).

The spelling of 220423063440 in words is "two hundred twenty billion, four hundred twenty-three million, sixty-three thousand, four hundred forty".