21446264412 has 72 divisors (see below), whose sum is σ = 55356065856. Its totient is φ = 6999243264.

The previous prime is 21446264393. The next prime is 21446264449.

21446264412 is a `hidden beast` number, since 2 + 1 + 4 + 4 + 6 + 2 + 644 + 1 + 2 = 666.

21446264412 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 330253 + ... + 389819.

It is an arithmetic number, because the mean of its divisors is an integer number (768834248).

Almost surely, 2^21446264412 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 21446264412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27678032928).

21446264412 is an abundant number, since it is smaller than the sum of its proper divisors (33909801444).

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

21446264412 is a wasteful number, since it uses less digits than its factorization.

21446264412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59787 (or 59782 counting only the distinct ones).

The product of its digits is 73728, while the sum is 36.

The spelling of 21446264412 in words is "twenty-one billion, four hundred forty-six million, two hundred sixty-four thousand, four hundred twelve".