21004213304142 has 48 divisors (see below), whose sum is σ = 45979305214752. Its totient is φ = 6929072778240.

The previous prime is 21004213304111. The next prime is 21004213304153. The reversal of 21004213304142 is 24140331240012.

21004213304142 is a `hidden beast` number, since 2 + 1 + 0 + 0 + 4 + 213 + 30 + 414 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 101935063 + ... + 102140909.

It is an arithmetic number, because the mean of its divisors is an integer number (957902191974).

Almost surely, 2^{21004213304142} is an apocalyptic number.

21004213304142 is an abundant number, since it is smaller than the sum of its proper divisors (24975091910610).

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

21004213304142 is a wasteful number, since it uses less digits than its factorization.

21004213304142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264393 (or 264390 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 21004213304142 its reverse (24140331240012), we get a palindrome (45144544544154).

The spelling of 21004213304142 in words is "twenty-one trillion, four billion, two hundred thirteen million, three hundred four thousand, one hundred forty-two".