21004014130044 has 24 divisors (see below), whose sum is σ = 53464763240448. Its totient is φ = 6364852766640.

The previous prime is 21004014130013. The next prime is 21004014130049. The reversal of 21004014130044 is 44003141040012.

It is a junction number, because it is equal to n+sod(n) for n = 21004014129996 and 21004014130023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21004014130049) 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, 79560659452 + ... + 79560659715.

It is an arithmetic number, because the mean of its divisors is an integer number (2227698468352).

Almost surely, 2^{21004014130044} is an apocalyptic number.

It is an amenable number.

21004014130044 is an abundant number, since it is smaller than the sum of its proper divisors (32460749110404).

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

21004014130044 is a wasteful number, since it uses less digits than its factorization.

21004014130044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159121319185 (or 159121319183 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 21004014130044 its reverse (44003141040012), we get a palindrome (65007155170056).

The spelling of 21004014130044 in words is "twenty-one trillion, four billion, fourteen million, one hundred thirty thousand, forty-four".