21846768513 has 8 divisors (see below), whose sum is σ = 29160724800. Its totient is φ = 14548662288.

The previous prime is 21846768479. The next prime is 21846768529. The reversal of 21846768513 is 31586764812.

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

It is not a de Polignac number, because 21846768513 - 2¹² = 21846764417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21846768313) 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, 3959298 + ... + 3964811.

It is an arithmetic number, because the mean of its divisors is an integer number (3645090600).

Almost surely, 2^21846768513 is an apocalyptic number.

It is an amenable number.

21846768513 is a deficient number, since it is larger than the sum of its proper divisors (7313956287).

21846768513 is an equidigital number, since it uses as much as digits as its factorization.

21846768513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7925031.

The product of its digits is 1935360, while the sum is 51.

The spelling of 21846768513 in words is "twenty-one billion, eight hundred forty-six million, seven hundred sixty-eight thousand, five hundred thirteen".