21063321323546 has 16 divisors (see below), whose sum is σ = 33263089807200. Its totient is φ = 9975798522288.

The previous prime is 21063321323543. The next prime is 21063321323581. The reversal of 21063321323546 is 64532312336012.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21063321323543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43204685 + ... + 43689488.

It is an arithmetic number, because the mean of its divisors is an integer number (2078943112950).

Almost surely, 2^{21063321323546} is an apocalyptic number.

21063321323546 is a deficient number, since it is larger than the sum of its proper divisors (12199768483654).

21063321323546 is a wasteful number, since it uses less digits than its factorization.

21063321323546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86900573.

The product of its (nonzero) digits is 466560, while the sum is 41.

Adding to 21063321323546 its reverse (64532312336012), we get a palindrome (85595633659558).

The spelling of 21063321323546 in words is "twenty-one trillion, sixty-three billion, three hundred twenty-one million, three hundred twenty-three thousand, five hundred forty-six".