21165650030 has 16 divisors (see below), whose sum is σ = 43540765920. Its totient is φ = 7256794272.

The previous prime is 21165650027. The next prime is 21165650083. The reversal of 21165650030 is 3005656112.

It is a junction number, because it is equal to n+sod(n) for n = 21165649975 and 21165650002.

It is a congruent number.

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 in 7 ways as a sum of consecutive naturals, for example, 151183145 + ... + 151183284.

It is an arithmetic number, because the mean of its divisors is an integer number (2721297870).

Almost surely, 2^21165650030 is an apocalyptic number.

21165650030 is an abundant number, since it is smaller than the sum of its proper divisors (22375115890).

21165650030 is a wasteful number, since it uses less digits than its factorization.

21165650030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302366443.

The product of its (nonzero) digits is 5400, while the sum is 29.

The spelling of 21165650030 in words is "twenty-one billion, one hundred sixty-five million, six hundred fifty thousand, thirty".