20440433442 has 96 divisors (see below), whose sum is σ = 48742989120. Its totient is φ = 5676105600.

The previous prime is 20440433441. The next prime is 20440433471. The reversal of 20440433442 is 24433404402.

It is a super-3 number, since 3×20440433442³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (20440433441) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1304092 + ... + 1319672.

It is an arithmetic number, because the mean of its divisors is an integer number (507739470).

Almost surely, 2^20440433442 is an apocalyptic number.

20440433442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 20440433442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24371494560).

20440433442 is an abundant number, since it is smaller than the sum of its proper divisors (28302555678).

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

20440433442 is a wasteful number, since it uses less digits than its factorization.

20440433442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15760 (or 15749 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 30.

Adding to 20440433442 its reverse (24433404402), we get a palindrome (44873837844).

The spelling of 20440433442 in words is "twenty billion, four hundred forty million, four hundred thirty-three thousand, four hundred forty-two".