21326036012442 has 64 divisors (see below), whose sum is σ = 54191637676800. Its totient is φ = 6089747054400.

The previous prime is 21326036012401. The next prime is 21326036012447. The reversal of 21326036012442 is 24421063062312.

21326036012442 is a `hidden beast` number, since 2 + 1 + 3 + 2 + 6 + 0 + 3 + 601 + 2 + 4 + 42 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 21326036012397 and 21326036012406.

It is not an unprimeable number, because it can be changed into a prime (21326036012447) 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 31 ways as a sum of consecutive naturals, for example, 15091809 + ... + 16444292.

It is an arithmetic number, because the mean of its divisors is an integer number (846744338700).

Almost surely, 2^{21326036012442} is an apocalyptic number.

21326036012442 is an abundant number, since it is smaller than the sum of its proper divisors (32865601664358).

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

21326036012442 is a wasteful number, since it uses less digits than its factorization.

21326036012442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31537908 (or 31537902 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

Adding to 21326036012442 its reverse (24421063062312), we get a palindrome (45747099074754).

The spelling of 21326036012442 in words is "twenty-one trillion, three hundred twenty-six billion, thirty-six million, twelve thousand, four hundred forty-two".