21010904313 has 8 divisors (see below), whose sum is σ = 32016616128. Its totient is φ = 12006231024.

The previous prime is 21010904309. The next prime is 21010904359. The reversal of 21010904313 is 31340901012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21010904313 - 2² = 21010904309 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21010902313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 500259606 + ... + 500259647.

It is an arithmetic number, because the mean of its divisors is an integer number (4002077016).

Almost surely, 2^21010904313 is an apocalyptic number.

It is an amenable number.

21010904313 is a deficient number, since it is larger than the sum of its proper divisors (11005711815).

21010904313 is a wasteful number, since it uses less digits than its factorization.

21010904313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000519263.

The product of its (nonzero) digits is 648, while the sum is 24.

The spelling of 21010904313 in words is "twenty-one billion, ten million, nine hundred four thousand, three hundred thirteen".