20440323040 has 48 divisors (see below), whose sum is σ = 48376249488. Its totient is φ = 8161570816.

The previous prime is 20440323017. The next prime is 20440323041. The reversal of 20440323040 is 4032304402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20440323041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23377 + ... + 203536.

It is an arithmetic number, because the mean of its divisors is an integer number (1007838531).

Almost surely, 2^20440323040 is an apocalyptic number.

20440323040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20440323040 is an abundant number, since it is smaller than the sum of its proper divisors (27935926448).

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

20440323040 is a wasteful number, since it uses less digits than its factorization.

20440323040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227491 (or 227483 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 22.

Adding to 20440323040 its reverse (4032304402), we get a palindrome (24472627442).

The spelling of 20440323040 in words is "twenty billion, four hundred forty million, three hundred twenty-three thousand, forty".