21342294168 has 64 divisors (see below), whose sum is σ = 58317692160. Its totient is φ = 6468840576.

The previous prime is 21342294121. The next prime is 21342294187. The reversal of 21342294168 is 86149224312.

It is a happy number.

It is a congruent number.

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, 489580 + ... + 531387.

It is an arithmetic number, because the mean of its divisors is an integer number (911213940).

Almost surely, 2^21342294168 is an apocalyptic number.

It is an amenable number.

21342294168 is an abundant number, since it is smaller than the sum of its proper divisors (36975397992).

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

21342294168 is a wasteful number, since it uses less digits than its factorization.

21342294168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021056 (or 1021052 counting only the distinct ones).

The product of its digits is 165888, while the sum is 42.

The spelling of 21342294168 in words is "twenty-one billion, three hundred forty-two million, two hundred ninety-four thousand, one hundred sixty-eight".