21246325311344 has 80 divisors (see below), whose sum is σ = 48576180258816. Its totient is φ = 8809453728000.

The previous prime is 21246325311317. The next prime is 21246325311359. The reversal of 21246325311344 is 44311352364212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12023159 + ... + 13676585.

Almost surely, 2^{21246325311344} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21246325311344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24288090129408).

21246325311344 is an abundant number, since it is smaller than the sum of its proper divisors (27329854947472).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21246325311344 is a wasteful number, since it uses less digits than its factorization.

21246325311344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1657174 (or 1657168 counting only the distinct ones).

The product of its digits is 414720, while the sum is 41.

Adding to 21246325311344 its reverse (44311352364212), we get a palindrome (65557677675556).

The spelling of 21246325311344 in words is "twenty-one trillion, two hundred forty-six billion, three hundred twenty-five million, three hundred eleven thousand, three hundred forty-four".