21468514228 has 48 divisors (see below), whose sum is σ = 43858007424. Its totient is φ = 9005368320.

The previous prime is 21468514211. The next prime is 21468514261. The reversal of 21468514228 is 82241586412.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 227676 + ... + 307852.

It is an arithmetic number, because the mean of its divisors is an integer number (913708488).

Almost surely, 2^21468514228 is an apocalyptic number.

21468514228 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

21468514228 is an abundant number, since it is smaller than the sum of its proper divisors (22389493196).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21468514228 is a wasteful number, since it uses less digits than its factorization.

21468514228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80392 (or 80390 counting only the distinct ones).

The product of its digits is 245760, while the sum is 43.

The spelling of 21468514228 in words is "twenty-one billion, four hundred sixty-eight million, five hundred fourteen thousand, two hundred twenty-eight".