20204040040442 has 8 divisors (see below), whose sum is σ = 30307925212500. Its totient is φ = 10101398302944.

The previous prime is 20204040040411. The next prime is 20204040040447. The reversal of 20204040040442 is 24404004040202.

It can be written as a sum of positive squares in 2 ways, for example, as 18207468214441 + 1996571826001 = 4267021^2 + 1413001^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20204040040447) 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, 310818017 + ... + 310883012.

Almost surely, 2^{20204040040442} is an apocalyptic number.

20204040040442 is a deficient number, since it is larger than the sum of its proper divisors (10103885172058).

20204040040442 is a wasteful number, since it uses less digits than its factorization.

20204040040442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621717280.

The product of its (nonzero) digits is 8192, while the sum is 26.

Adding to 20204040040442 its reverse (24404004040202), we get a palindrome (44608044080644).

The spelling of 20204040040442 in words is "twenty trillion, two hundred four billion, forty million, forty thousand, four hundred forty-two".