20444000440 has 16 divisors (see below), whose sum is σ = 45999001080. Its totient is φ = 8177600160.

The previous prime is 20444000431. The next prime is 20444000443. The reversal of 20444000440 is 4400044402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20444000443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255549966 + ... + 255550045.

Almost surely, 2^20444000440 is an apocalyptic number.

20444000440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20444000440 is an abundant number, since it is smaller than the sum of its proper divisors (25555000640).

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

20444000440 is a wasteful number, since it uses less digits than its factorization.

20444000440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511100022 (or 511100018 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 22.

Adding to 20444000440 its reverse (4400044402), we get a palindrome (24844044842).

The spelling of 20444000440 in words is "twenty billion, four hundred forty-four million, four hundred forty", and thus it is an aban number.