21630307043166 has 8 divisors (see below), whose sum is σ = 43260614086344. Its totient is φ = 7210102347720.

The previous prime is 21630307043117. The next prime is 21630307043239. The reversal of 21630307043166 is 66134070303612.

It is a sphenic number, since it is the product of 3 distinct primes.

21630307043166 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1802525586925 + ... + 1802525586936.

It is an arithmetic number, because the mean of its divisors is an integer number (5407576760793).

Almost surely, 2^{21630307043166} is an apocalyptic number.

21630307043166 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21630307043166 is a wasteful number, since it uses less digits than its factorization.

21630307043166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3605051173866.

The product of its (nonzero) digits is 326592, while the sum is 42.

Adding to 21630307043166 its reverse (66134070303612), we get a palindrome (87764377346778).

The spelling of 21630307043166 in words is "twenty-one trillion, six hundred thirty billion, three hundred seven million, forty-three thousand, one hundred sixty-six".