21103851668602 has 16 divisors (see below), whose sum is σ = 32090608809792. Its totient is φ = 10406992790880.

The previous prime is 21103851668597. The next prime is 21103851668611. The reversal of 21103851668602 is 20686615830112.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1287483 + ... + 6623089.

It is an arithmetic number, because the mean of its divisors is an integer number (2005663050612).

Almost surely, 2^{21103851668602} is an apocalyptic number.

21103851668602 is a deficient number, since it is larger than the sum of its proper divisors (10986757141190).

21103851668602 is a wasteful number, since it uses less digits than its factorization.

21103851668602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5362773.

The product of its (nonzero) digits is 829440, while the sum is 49.

The spelling of 21103851668602 in words is "twenty-one trillion, one hundred three billion, eight hundred fifty-one million, six hundred sixty-eight thousand, six hundred two".