21340162166 has 8 divisors (see below), whose sum is σ = 32047337664. Its totient is φ = 10657716280.

The previous prime is 21340162147. The next prime is 21340162211. The reversal of 21340162166 is 66126104312.

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

It is a Curzon 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, 6180245 + ... + 6183696.

It is an arithmetic number, because the mean of its divisors is an integer number (4005917208).

Almost surely, 2^21340162166 is an apocalyptic number.

21340162166 is a deficient number, since it is larger than the sum of its proper divisors (10707175498).

21340162166 is a wasteful number, since it uses less digits than its factorization.

21340162166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12364806.

The product of its (nonzero) digits is 10368, while the sum is 32.

Adding to 21340162166 its reverse (66126104312), we get a palindrome (87466266478).

The spelling of 21340162166 in words is "twenty-one billion, three hundred forty million, one hundred sixty-two thousand, one hundred sixty-six".