20540113442 has 16 divisors (see below), whose sum is σ = 30909288312. Its totient is φ = 10237069440.

The previous prime is 20540113421. The next prime is 20540113463. The reversal of 20540113442 is 24431104502.

It is an interprime number because it is at equal distance from previous prime (20540113421) and next prime (20540113463).

It can be written as a sum of positive squares in 4 ways, for example, as 10166487241 + 10373626201 = 100829^2 + 101851^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 818108 + ... + 842840.

Almost surely, 2^20540113442 is an apocalyptic number.

20540113442 is a deficient number, since it is larger than the sum of its proper divisors (10369174870).

20540113442 is a wasteful number, since it uses less digits than its factorization.

20540113442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26053.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 20540113442 its reverse (24431104502), we get a palindrome (44971217944).

The spelling of 20540113442 in words is "twenty billion, five hundred forty million, one hundred thirteen thousand, four hundred forty-two".