21300510217 has 8 divisors (see below), whose sum is σ = 24347094912. Its totient is φ = 18254839200.

The previous prime is 21300510211. The next prime is 21300510227. The reversal of 21300510217 is 71201500312.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21300510217 - 2⁷ = 21300510089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21300510211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177709 + ... + 272362.

It is an arithmetic number, because the mean of its divisors is an integer number (3043386864).

Almost surely, 2^21300510217 is an apocalyptic number.

It is an amenable number.

21300510217 is a deficient number, since it is larger than the sum of its proper divisors (3046584695).

21300510217 is an equidigital number, since it uses as much as digits as its factorization.

21300510217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456839.

The product of its (nonzero) digits is 420, while the sum is 22.

The spelling of 21300510217 in words is "twenty-one billion, three hundred million, five hundred ten thousand, two hundred seventeen".