21334056544 has 12 divisors (see below), whose sum is σ = 42001423884. Its totient is φ = 10667028256.

The previous prime is 21334056487. The next prime is 21334056607. The reversal of 21334056544 is 44565043312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333344602 + ... + 333344665.

It is an arithmetic number, because the mean of its divisors is an integer number (3500118657).

Almost surely, 2^21334056544 is an apocalyptic number.

It is an amenable number.

21334056544 is a deficient number, since it is larger than the sum of its proper divisors (20667367340).

21334056544 is an equidigital number, since it uses as much as digits as its factorization.

21334056544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666689277 (or 666689269 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 37.

Adding to 21334056544 its reverse (44565043312), we get a palindrome (65899099856).

The spelling of 21334056544 in words is "twenty-one billion, three hundred thirty-four million, fifty-six thousand, five hundred forty-four".