21602620612 has 6 divisors (see below), whose sum is σ = 37804586078. Its totient is φ = 10801310304.

The previous prime is 21602620601. The next prime is 21602620651.

21602620612 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 19183358016 + 2419262596 = 138504^2 + 49186^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 2700327573 + ... + 2700327580.

Almost surely, 2^21602620612 is an apocalyptic number.

It is an amenable number.

21602620612 is a deficient number, since it is larger than the sum of its proper divisors (16201965466).

21602620612 is a wasteful number, since it uses less digits than its factorization.

21602620612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5400655157 (or 5400655155 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The spelling of 21602620612 in words is "twenty-one billion, six hundred two million, six hundred twenty thousand, six hundred twelve".