21251064633230 has 16 divisors (see below), whose sum is σ = 38252006539920. Its totient is φ = 8500405808832.

The previous prime is 21251064633229. The next prime is 21251064633247. The reversal of 21251064633230 is 3233646015212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2405681 + ... + 6949059.

It is an arithmetic number, because the mean of its divisors is an integer number (2390750408745).

Almost surely, 2^{21251064633230} is an apocalyptic number.

21251064633230 is a deficient number, since it is larger than the sum of its proper divisors (17000941906690).

21251064633230 is a wasteful number, since it uses less digits than its factorization.

21251064633230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5011123.

The product of its (nonzero) digits is 155520, while the sum is 38.

The spelling of 21251064633230 in words is "twenty-one trillion, two hundred fifty-one billion, sixty-four million, six hundred thirty-three thousand, two hundred thirty".