21004134141246 has 16 divisors (see below), whose sum is σ = 42310486041600. Its totient is φ = 6951008420568.

The previous prime is 21004134141203. The next prime is 21004134141247. The reversal of 21004134141246 is 64214143140012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21004134141247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12592405726 + ... + 12592407393.

It is an arithmetic number, because the mean of its divisors is an integer number (2644405377600).

Almost surely, 2^{21004134141246} is an apocalyptic number.

21004134141246 is an abundant number, since it is smaller than the sum of its proper divisors (21306351900354).

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

21004134141246 is a wasteful number, since it uses less digits than its factorization.

21004134141246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25184813263.

The product of its (nonzero) digits is 18432, while the sum is 33.

Adding to 21004134141246 its reverse (64214143140012), we get a palindrome (85218277281258).

The spelling of 21004134141246 in words is "twenty-one trillion, four billion, one hundred thirty-four million, one hundred forty-one thousand, two hundred forty-six".