21014446455 has 48 divisors (see below), whose sum is σ = 38058508800. Its totient is φ = 10706376384.

The previous prime is 21014446433. The next prime is 21014446457. The reversal of 21014446455 is 55464441012.

21014446455 is a `hidden beast` number, since 2 + 1 + 0 + 1 + 4 + 4 + 4 + 645 + 5 = 666.

It is not a de Polignac number, because 21014446455 - 2⁵ = 21014446423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21014446457) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 801646 + ... + 827444.

It is an arithmetic number, because the mean of its divisors is an integer number (792885600).

Almost surely, 2^21014446455 is an apocalyptic number.

21014446455 is a deficient number, since it is larger than the sum of its proper divisors (17044062345).

21014446455 is a wasteful number, since it uses less digits than its factorization.

21014446455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26620 (or 26617 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

Adding to 21014446455 its reverse (55464441012), we get a palindrome (76478887467).

The spelling of 21014446455 in words is "twenty-one billion, fourteen million, four hundred forty-six thousand, four hundred fifty-five".