21202061676968 has 8 divisors (see below), whose sum is σ = 39753865644330. Its totient is φ = 10601030838480.

The previous prime is 21202061676967. The next prime is 21202061676973. The reversal of 21202061676968 is 86967616020212.

It can be written as a sum of positive squares in only one way, i.e., 14638719819364 + 6563341857604 = 3826058^2 + 2561902^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (21202061676967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1325128854803 + ... + 1325128854818.

Almost surely, 2^{21202061676968} is an apocalyptic number.

It is an amenable number.

21202061676968 is a deficient number, since it is larger than the sum of its proper divisors (18551803967362).

21202061676968 is a wasteful number, since it uses less digits than its factorization.

21202061676968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2650257709627 (or 2650257709623 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 56.

The spelling of 21202061676968 in words is "twenty-one trillion, two hundred two billion, sixty-one million, six hundred seventy-six thousand, nine hundred sixty-eight".