220320012440 has 64 divisors (see below), whose sum is σ = 553975420320. Its totient is φ = 78162304000.

The previous prime is 220320012391. The next prime is 220320012469. The reversal of 220320012440 is 44210023022.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

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, 6088391 + ... + 6124470.

Almost surely, 2^220320012440 is an apocalyptic number.

220320012440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220320012440 is an abundant number, since it is smaller than the sum of its proper divisors (333655407880).

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

220320012440 is a wasteful number, since it uses less digits than its factorization.

220320012440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12212924 (or 12212920 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 220320012440 its reverse (44210023022), we get a palindrome (264530035462).

The spelling of 220320012440 in words is "two hundred twenty billion, three hundred twenty million, twelve thousand, four hundred forty".