20473442144 has 48 divisors (see below), whose sum is σ = 41188912128. Its totient is φ = 10013023872.

The previous prime is 20473442141. The next prime is 20473442173. The reversal of 20473442144 is 44124437402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20473442141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3677507 + ... + 3683069.

It is an arithmetic number, because the mean of its divisors is an integer number (858102336).

Almost surely, 2^20473442144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20473442144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20594456064).

20473442144 is an abundant number, since it is smaller than the sum of its proper divisors (20715469984).

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

20473442144 is a wasteful number, since it uses less digits than its factorization.

20473442144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8067 (or 8059 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 35.

Adding to 20473442144 its reverse (44124437402), we get a palindrome (64597879546).

The spelling of 20473442144 in words is "twenty billion, four hundred seventy-three million, four hundred forty-two thousand, one hundred forty-four".