21345150166 has 8 divisors (see below), whose sum is σ = 32040615600. Its totient is φ = 10664944968.

The previous prime is 21345150121. The next prime is 21345150191. The reversal of 21345150166 is 66105154312.

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, 3811561 + ... + 3817156.

It is an arithmetic number, because the mean of its divisors is an integer number (4005076950).

Almost surely, 2^21345150166 is an apocalyptic number.

21345150166 is a deficient number, since it is larger than the sum of its proper divisors (10695465434).

21345150166 is a wasteful number, since it uses less digits than its factorization.

21345150166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7630118.

The product of its (nonzero) digits is 21600, while the sum is 34.

The spelling of 21345150166 in words is "twenty-one billion, three hundred forty-five million, one hundred fifty thousand, one hundred sixty-six".