21353214166 has 8 divisors (see below), whose sum is σ = 32143807224. Its totient is φ = 10638611760.

The previous prime is 21353214119. The next prime is 21353214173. The reversal of 21353214166 is 66141235312.

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

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, 18996960 + ... + 18998083.

It is an arithmetic number, because the mean of its divisors is an integer number (4017975903).

Almost surely, 2^21353214166 is an apocalyptic number.

21353214166 is a deficient number, since it is larger than the sum of its proper divisors (10790593058).

21353214166 is a wasteful number, since it uses less digits than its factorization.

21353214166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37995326.

The product of its digits is 25920, while the sum is 34.

Adding to 21353214166 its reverse (66141235312), we get a palindrome (87494449478).

The spelling of 21353214166 in words is "twenty-one billion, three hundred fifty-three million, two hundred fourteen thousand, one hundred sixty-six".