21246064311 has 8 divisors (see below), whose sum is σ = 28360390384. Its totient is φ = 14147890560.

The previous prime is 21246064253. The next prime is 21246064379. The reversal of 21246064311 is 11346064212.

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

It is not a de Polignac number, because 21246064311 - 2⁹ = 21246063799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21246064711) 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, 4035010 + ... + 4040271.

It is an arithmetic number, because the mean of its divisors is an integer number (3545048798).

Almost surely, 2^21246064311 is an apocalyptic number.

21246064311 is a deficient number, since it is larger than the sum of its proper divisors (7114326073).

21246064311 is an equidigital number, since it uses as much as digits as its factorization.

21246064311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8076161.

The product of its (nonzero) digits is 6912, while the sum is 30.

Subtracting from 21246064311 its reverse (11346064212), we obtain a palindrome (9900000099).

The spelling of 21246064311 in words is "twenty-one billion, two hundred forty-six million, sixty-four thousand, three hundred eleven".