21150035304666 has 32 divisors (see below), whose sum is σ = 43348004050176. Its totient is φ = 6875484960000.

The previous prime is 21150035304611. The next prime is 21150035304683. The reversal of 21150035304666 is 66640353005112.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15437235 + ... + 16751366.

It is an arithmetic number, because the mean of its divisors is an integer number (1354625126568).

Almost surely, 2^{21150035304666} is an apocalyptic number.

21150035304666 is an abundant number, since it is smaller than the sum of its proper divisors (22197968745510).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21150035304666 is a wasteful number, since it uses less digits than its factorization.

21150035304666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32191318.

The product of its (nonzero) digits is 388800, while the sum is 42.

Adding to 21150035304666 its reverse (66640353005112), we get a palindrome (87790388309778).

The spelling of 21150035304666 in words is "twenty-one trillion, one hundred fifty billion, thirty-five million, three hundred four thousand, six hundred sixty-six".