21072630044 has 6 divisors (see below), whose sum is σ = 36877102584. Its totient is φ = 10536315020.

The previous prime is 21072629993. The next prime is 21072630071. The reversal of 21072630044 is 44003627012.

It is a junction number, because it is equal to n+sod(n) for n = 21072629989 and 21072630016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2634078752 + ... + 2634078759.

It is an arithmetic number, because the mean of its divisors is an integer number (6146183764).

Almost surely, 2^21072630044 is an apocalyptic number.

It is an amenable number.

21072630044 is a deficient number, since it is larger than the sum of its proper divisors (15804472540).

21072630044 is a wasteful number, since it uses less digits than its factorization.

21072630044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5268157515 (or 5268157513 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 29.

The spelling of 21072630044 in words is "twenty-one billion, seventy-two million, six hundred thirty thousand, forty-four".