21446055396 has 144 divisors (see below), whose sum is σ = 56910823424. Its totient is φ = 7061315616.

The previous prime is 21446055377. The next prime is 21446055427. The reversal of 21446055396 is 69355064412.

21446055396 is a `hidden beast` number, since 2 + 1 + 4 + 4 + 6 + 0 + 553 + 96 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 35330925 + ... + 35331531.

Almost surely, 2^21446055396 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 21446055396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28455411712).

21446055396 is an abundant number, since it is smaller than the sum of its proper divisors (35464768028).

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

21446055396 is a wasteful number, since it uses less digits than its factorization.

21446055396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1012 (or 998 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 45.

The spelling of 21446055396 in words is "twenty-one billion, four hundred forty-six million, fifty-five thousand, three hundred ninety-six".