20130400204042 has 8 divisors (see below), whose sum is σ = 30690610147332. Its totient is φ = 9900196821600.

The previous prime is 20130400204003. The next prime is 20130400204043. The reversal of 20130400204042 is 24040200403102.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19761767867241 + 368632336801 = 4445421^2 + 607151^2 .

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 (20130400204043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82501640059 + ... + 82501640302.

Almost surely, 2^{20130400204042} is an apocalyptic number.

20130400204042 is a deficient number, since it is larger than the sum of its proper divisors (10560209943290).

20130400204042 is a wasteful number, since it uses less digits than its factorization.

20130400204042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165003280424.

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 20130400204042 its reverse (24040200403102), we get a palindrome (44170600607144).

The spelling of 20130400204042 in words is "twenty trillion, one hundred thirty billion, four hundred million, two hundred four thousand, forty-two".