20404432140352 has 112 divisors (see below), whose sum is σ = 45111985813440. Its totient is φ = 9091942852608.

The previous prime is 20404432140347. The next prime is 20404432140401. The reversal of 20404432140352 is 25304123440402.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 378372463 + ... + 378426385.

It is an arithmetic number, because the mean of its divisors is an integer number (402785587620).

Almost surely, 2^{20404432140352} 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 20404432140352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22555992906720).

20404432140352 is an abundant number, since it is smaller than the sum of its proper divisors (24707553673088).

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

20404432140352 is a wasteful number, since it uses less digits than its factorization.

20404432140352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69660 (or 69650 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 34.

Adding to 20404432140352 its reverse (25304123440402), we get a palindrome (45708555580754).

The spelling of 20404432140352 in words is "twenty trillion, four hundred four billion, four hundred thirty-two million, one hundred forty thousand, three hundred fifty-two".