21113011564546 has 16 divisors (see below), whose sum is σ = 36580832871840. Its totient is φ = 9032304412480.

The previous prime is 21113011564543. The next prime is 21113011564553. The reversal of 21113011564546 is 64546511031112.

It is a super-2 number, since 2×21113011564546² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21113011564499 and 21113011564508.

It is not an unprimeable number, because it can be changed into a prime (21113011564543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28225950916 + ... + 28225951663.

It is an arithmetic number, because the mean of its divisors is an integer number (2286302054490).

Almost surely, 2^{21113011564546} is an apocalyptic number.

21113011564546 is a deficient number, since it is larger than the sum of its proper divisors (15467821307294).

21113011564546 is a wasteful number, since it uses less digits than its factorization.

21113011564546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56451902609.

The product of its (nonzero) digits is 86400, while the sum is 40.

Adding to 21113011564546 its reverse (64546511031112), we get a palindrome (85659522595658).

The spelling of 21113011564546 in words is "twenty-one trillion, one hundred thirteen billion, eleven million, five hundred sixty-four thousand, five hundred forty-six".