21481296216 has 32 divisors (see below), whose sum is σ = 53710218240. Its totient is φ = 7159501728.

The previous prime is 21481296211. The next prime is 21481296259. The reversal of 21481296216 is 61269218412.

It is a super-2 number, since 2×21481296216² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21481296211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144885 + ... + 252891.

It is an arithmetic number, because the mean of its divisors is an integer number (1678444320).

Almost surely, 2^21481296216 is an apocalyptic number.

It is an amenable number.

21481296216 is an abundant number, since it is smaller than the sum of its proper divisors (32228922024).

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

21481296216 is a wasteful number, since it uses less digits than its factorization.

21481296216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116303 (or 116299 counting only the distinct ones).

The product of its digits is 82944, while the sum is 42.

The spelling of 21481296216 in words is "twenty-one billion, four hundred eighty-one million, two hundred ninety-six thousand, two hundred sixteen".