21003060208 has 20 divisors (see below), whose sum is σ = 43823693368. Its totient is φ = 9693720000.

The previous prime is 21003060181. The next prime is 21003060209. The reversal of 21003060208 is 80206030012.

It is a super-2 number, since 2×21003060208² (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 (21003060209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50487918 + ... + 50488333.

Almost surely, 2^21003060208 is an apocalyptic number.

It is an amenable number.

21003060208 is an abundant number, since it is smaller than the sum of its proper divisors (22820633160).

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

21003060208 is a wasteful number, since it uses less digits than its factorization.

21003060208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100976272 (or 100976266 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The spelling of 21003060208 in words is "twenty-one billion, three million, sixty thousand, two hundred eight".