20440020320 has 24 divisors (see below), whose sum is σ = 48289548384. Its totient is φ = 8176008064.

The previous prime is 20440020301. The next prime is 20440020347. The reversal of 20440020320 is 2302004402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63874904 + ... + 63875223.

It is an arithmetic number, because the mean of its divisors is an integer number (2012064516).

Almost surely, 2^20440020320 is an apocalyptic number.

20440020320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20440020320 is an abundant number, since it is smaller than the sum of its proper divisors (27849528064).

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

20440020320 is a wasteful number, since it uses less digits than its factorization.

20440020320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127750142 (or 127750134 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 17.

Adding to 20440020320 its reverse (2302004402), we get a palindrome (22742024722).

The spelling of 20440020320 in words is "twenty billion, four hundred forty million, twenty thousand, three hundred twenty".