20444140420 has 24 divisors (see below), whose sum is σ = 46835667648. Its totient is φ = 7434232800.

The previous prime is 20444140393. The next prime is 20444140421. The reversal of 20444140420 is 2404144402.

It is not an unprimeable number, because it can be changed into a prime (20444140421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46463736 + ... + 46464175.

It is an arithmetic number, because the mean of its divisors is an integer number (1951486152).

Almost surely, 2^20444140420 is an apocalyptic number.

20444140420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20444140420 is an abundant number, since it is smaller than the sum of its proper divisors (26391527228).

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

20444140420 is a wasteful number, since it uses less digits than its factorization.

20444140420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92927931 (or 92927929 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 25.

Adding to 20444140420 its reverse (2404144402), we get a palindrome (22848284822).

The spelling of 20444140420 in words is "twenty billion, four hundred forty-four million, one hundred forty thousand, four hundred twenty".