21113305054 has 16 divisors (see below), whose sum is σ = 32214712320. Its totient is φ = 10376266680.

The previous prime is 21113305051. The next prime is 21113305063. The reversal of 21113305054 is 45050331112.

It is a happy number.

It is a super-3 number, since 3×21113305054³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113305051) 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 7 ways as a sum of consecutive naturals, for example, 264382 + ... + 334849.

It is an arithmetic number, because the mean of its divisors is an integer number (2013419520).

Almost surely, 2^21113305054 is an apocalyptic number.

21113305054 is a deficient number, since it is larger than the sum of its proper divisors (11101407266).

21113305054 is a wasteful number, since it uses less digits than its factorization.

21113305054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599535.

The product of its (nonzero) digits is 1800, while the sum is 25.

Adding to 21113305054 its reverse (45050331112), we get a palindrome (66163636166).

The spelling of 21113305054 in words is "twenty-one billion, one hundred thirteen million, three hundred five thousand, fifty-four".