21330434030044 has 48 divisors (see below), whose sum is σ = 39551006164320. Its totient is φ = 10031005163520.

The previous prime is 21330434030033. The next prime is 21330434030071. The reversal of 21330434030044 is 44003043403312.

It is a junction number, because it is equal to n+sod(n) for n = 21330434029988 and 21330434030015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 640210074 + ... + 640243390.

It is an arithmetic number, because the mean of its divisors is an integer number (823979295090).

Almost surely, 2^{21330434030044} is an apocalyptic number.

It is an amenable number.

21330434030044 is a deficient number, since it is larger than the sum of its proper divisors (18220572134276).

21330434030044 is a wasteful number, since it uses less digits than its factorization.

21330434030044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39478 (or 39476 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 31.

Adding to 21330434030044 its reverse (44003043403312), we get a palindrome (65333477433356).

The spelling of 21330434030044 in words is "twenty-one trillion, three hundred thirty billion, four hundred thirty-four million, thirty thousand, forty-four".