21482140068 has 18 divisors (see below), whose sum is σ = 54302076374. Its totient is φ = 7160713344.

The previous prime is 21482140067. The next prime is 21482140073. The reversal of 21482140068 is 86004128412.

It can be written as a sum of positive squares in only one way, i.e., 20343887424 + 1138252644 = 142632^2 + 33738^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×21482140068² (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), and also a Moran number because the ratio is a prime number: 596726113 = 21482140068 / (2 + 1 + 4 + 8 + 2 + 1 + 4 + 0 + 0 + 6 + 8).

It is not an unprimeable number, because it can be changed into a prime (21482140067) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 298363021 + ... + 298363092.

Almost surely, 2^21482140068 is an apocalyptic number.

It is an amenable number.

21482140068 is an abundant number, since it is smaller than the sum of its proper divisors (32819936306).

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

21482140068 is a wasteful number, since it uses less digits than its factorization.

21482140068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596726123 (or 596726118 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The spelling of 21482140068 in words is "twenty-one billion, four hundred eighty-two million, one hundred forty thousand, sixty-eight".