20440404440442 has 24 divisors (see below), whose sum is σ = 50614334805216. Its totient is φ = 5840115554376.

The previous prime is 20440404440419. The next prime is 20440404440459. The reversal of 20440404440442 is 24404440404402.

20440404440442 is a `hidden beast` number, since 204 + 4 + 0 + 4 + 0 + 4 + 4 + 4 + 0 + 442 = 666.

It is a super-2 number, since 2×20440404440442² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20440404440397 and 20440404440406.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 81112715908 + ... + 81112716159.

It is an arithmetic number, because the mean of its divisors is an integer number (2108930616884).

Almost surely, 2^{20440404440442} is an apocalyptic number.

20440404440442 is an abundant number, since it is smaller than the sum of its proper divisors (30173930364774).

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

20440404440442 is a wasteful number, since it uses less digits than its factorization.

20440404440442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162225432082 (or 162225432079 counting only the distinct ones).

The product of its (nonzero) digits is 262144, while the sum is 36.

Adding to 20440404440442 its reverse (24404440404402), we get a palindrome (44844844844844).

The spelling of 20440404440442 in words is "twenty trillion, four hundred forty billion, four hundred four million, four hundred forty thousand, four hundred forty-two".