21482218512 has 30 divisors (see below), whose sum is σ = 60120375822. Its totient is φ = 7160739456.

The previous prime is 21482218507. The next prime is 21482218547. The reversal of 21482218512 is 21581228412.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 15851817216 + 5630401296 = 125904^2 + 75036^2 .

It is a super-2 number, since 2×21482218512² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 74590893 + ... + 74591180.

Almost surely, 2^21482218512 is an apocalyptic number.

It is an amenable number.

21482218512 is an abundant number, since it is smaller than the sum of its proper divisors (38638157310).

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

21482218512 is a wasteful number, since it uses less digits than its factorization.

21482218512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149182087 (or 149182078 counting only the distinct ones).

The product of its digits is 20480, while the sum is 36.

The spelling of 21482218512 in words is "twenty-one billion, four hundred eighty-two million, two hundred eighteen thousand, five hundred twelve".