20400244044 has 48 divisors (see below), whose sum is σ = 47872312320. Its totient is φ = 6761367360.

The previous prime is 20400244027. The next prime is 20400244049. The reversal of 20400244044 is 44044200402.

It is not an unprimeable number, because it can be changed into a prime (20400244049) by changing a digit.

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, 1620414 + ... + 1632954.

It is an arithmetic number, because the mean of its divisors is an integer number (997339840).

Almost surely, 2^20400244044 is an apocalyptic number.

It is an amenable number.

20400244044 is an abundant number, since it is smaller than the sum of its proper divisors (27472068276).

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

20400244044 is a wasteful number, since it uses less digits than its factorization.

20400244044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13310 (or 13308 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 24.

Adding to 20400244044 its reverse (44044200402), we get a palindrome (64444444446).

The spelling of 20400244044 in words is "twenty billion, four hundred million, two hundred forty-four thousand, forty-four".