21020069106044 has 12 divisors (see below), whose sum is σ = 36785169069600. Its totient is φ = 10510020800448.

The previous prime is 21020069106037. The next prime is 21020069106059. The reversal of 21020069106044 is 44060196002012.

It is a junction number, because it is equal to n+sod(n) for n = 21020069105995 and 21020069106013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 502772 + ... + 6503300.

It is an arithmetic number, because the mean of its divisors is an integer number (3065430755800).

Almost surely, 2^{21020069106044} is an apocalyptic number.

It is an amenable number.

21020069106044 is a deficient number, since it is larger than the sum of its proper divisors (15765099963556).

21020069106044 is a wasteful number, since it uses less digits than its factorization.

21020069106044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6876292 (or 6876290 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The spelling of 21020069106044 in words is "twenty-one trillion, twenty billion, sixty-nine million, one hundred six thousand, forty-four".