20240320440 has 64 divisors (see below), whose sum is σ = 61258356000. Its totient is φ = 5349650432.

The previous prime is 20240320423. The next prime is 20240320469. The reversal of 20240320440 is 4402304202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 732765 + ... + 759884.

Almost surely, 2^20240320440 is an apocalyptic number.

20240320440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20240320440 is an abundant number, since it is smaller than the sum of its proper divisors (41018035560).

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

20240320440 is a wasteful number, since it uses less digits than its factorization.

20240320440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1492776 (or 1492772 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 21.

Adding to 20240320440 its reverse (4402304202), we get a palindrome (24642624642).

The spelling of 20240320440 in words is "twenty billion, two hundred forty million, three hundred twenty thousand, four hundred forty".