21060105216674 has 4 divisors (see below), whose sum is σ = 31590157825014. Its totient is φ = 10530052608336.

The previous prime is 21060105216653. The next prime is 21060105216691. The reversal of 21060105216674 is 47661250106012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 13101178398025 + 7958926818649 = 3619555^2 + 2821157^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5265026304167 + ... + 5265026304170.

Almost surely, 2^{21060105216674} is an apocalyptic number.

21060105216674 is a deficient number, since it is larger than the sum of its proper divisors (10530052608340).

21060105216674 is a wasteful number, since it uses less digits than its factorization.

21060105216674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10530052608339.

The product of its (nonzero) digits is 120960, while the sum is 41.

The spelling of 21060105216674 in words is "twenty-one trillion, sixty billion, one hundred five million, two hundred sixteen thousand, six hundred seventy-four".