20440442320 has 40 divisors (see below), whose sum is σ = 50319562824. Its totient is φ = 7695224832.

The previous prime is 20440442311. The next prime is 20440442339. The reversal of 20440442320 is 2324404402.

It can be written as a sum of positive squares in 4 ways, for example, as 990235024 + 19450207296 = 31468^2 + 139464^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

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, 7513509 + ... + 7516228.

Almost surely, 2^20440442320 is an apocalyptic number.

20440442320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20440442320 is an abundant number, since it is smaller than the sum of its proper divisors (29879120504).

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

20440442320 is a wasteful number, since it uses less digits than its factorization.

20440442320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15029767 (or 15029761 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 25.

Adding to 20440442320 its reverse (2324404402), we get a palindrome (22764846722).

The spelling of 20440442320 in words is "twenty billion, four hundred forty million, four hundred forty-two thousand, three hundred twenty".