21216403303482 has 16 divisors (see below), whose sum is σ = 42433378699392. Its totient is φ = 7072039085760.

The previous prime is 21216403303409. The next prime is 21216403303483. The reversal of 21216403303482 is 28430330461212.

It is a self number, because there is not a number n which added to its sum of digits gives 21216403303482.

It is not an unprimeable number, because it can be changed into a prime (21216403303483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23354319 + ... + 24245762.

It is an arithmetic number, because the mean of its divisors is an integer number (2652086168712).

Almost surely, 2^{21216403303482} is an apocalyptic number.

21216403303482 is an abundant number, since it is smaller than the sum of its proper divisors (21216975395910).

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

21216403303482 is a wasteful number, since it uses less digits than its factorization.

21216403303482 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47674373.

The product of its (nonzero) digits is 165888, while the sum is 39.

Adding to 21216403303482 its reverse (28430330461212), we get a palindrome (49646733764694).

The spelling of 21216403303482 in words is "twenty-one trillion, two hundred sixteen billion, four hundred three million, three hundred three thousand, four hundred eighty-two".